Surface-Treatment Agent For Powder For Use In Cosmetic And Cosmetic Containing Powder Treated With The Same

ABSTRACT

The present invention relates to a surface-treatment agent for powders for use in cosmetics, including a specific polymer having a specified carbosiloxane dendrimer structure, as well as a cosmetic comprising a powder which has been treated with the above surface-treatment agent. The surface-treated powder does not generate hydrogen, and therefore is safe. Further the surface-treated powder can exhibits, good compatibility with other cosmetic raw materials, and thereby, the stability of the formulation in cosmetics can be improved. The surface-treated powder can provide cosmetics with good water resistance, good sebum resistance, good glossiness, a good tactile sensation, good adhesive properties to hair and/or skin, or the like. The cosmetic can also have superior surface protective properties, a superior outer appearance, and/or a superior sensation during use.

TECHNICAL FIELD

The present invention relates to a cosmetic, and in particular, relatesto a novel surface-treatment agent for powders for use in cosmetics,which contains a polymer having a carbosiloxane dendrimer structure witha specified structure, as well as a cosmetic containing powders whichare subjected to a surface treatment with the aforementionedsurface-treatment agent for powders for use in a cosmetic.

Priority is claimed on Japanese Patent Application No. 2009-293391,filed on Dec. 24, 2009, the content of which is incorporated herein byreference.

BACKGROUND ART

Recently, as various types of surface-treatment agents for use incosmetics, methylhydrogenpolysiloxanes have been widely used. Powderstreated with methylhydrogenpolysiloxanes exhibit increased waterrepellency, and for this reason, characteristics of improving make-updurability are exhibited. However, since the methylhydrogenpolysiloxanesinduce not only a reaction with the surface of powder, but also anintermolecularly-cross linking reaction during surface-treating, therate of reaction is reduced. As a result, unreacted Si—H bonds remain onthe surface-treated powders. Therefore, hydrogen may generate as a gasdepending on the conditions, and this is dangerous in the presence offire or the like. In addition, there are various problems of causingexpansion of a cosmetic container, fogging of compact mirror and thelike.

In order to solve the aforementioned problems, Japanese UnexaminedPatent Application, First Publication No. H05-237360 proposes a methodin which surface-treated powders are treated at high temperature so thatSi—H bonds do not remain as much as possible. However, theaforementioned method cannot be applied to heat-sensitive powders suchas yellow iron oxide, Red No. 202 and the like, and further improvementsare needed.

Under the circumstances described above, as a method in which residualSi—H bonds are not produced, Japanese Unexamined Patent Application,First Publication No. H07-196946 proposes a surface-treatment methodusing a one-terminal alkoxy-modified silicone, and WO 2002/100356proposes a surface-treatment method using an acryl-modified siliconehaving an alkoxysilyl group. However, in the case of using theone-terminal alkoxy-modified silicone, the amount of the alkoxy group isreduced, and for this reason, there is a problem in that low reactivitywith the powders is exhibited. On the other hand, in thesurface-treatment method using an acryl-modified silicone having analkoxysilyl group, the acryl-modified silicone having a linear siliconeis grafted on an acryl main chain, and for this reason, there is aproblem in that sebum resistance and the like are not sufficient. Inaddition, powders surface-treated with the acryl-modified siliconehaving an alkoxysilyl group exhibit low compatibility with other rawmaterials for cosmetics, and there is a problem in view of stability inblending in cosmetics.

On the other hand, in order to ameliorate the problems caused by thelinear silicones, a cosmetic raw material comprising a vinyl-basedpolymer having a carbosiloxane dendrimer structure at the side chain ora vinyl-based polymer having both a carbosiloxane dendrimer structureand a fluorinated organic group, as a main agent is proposed (seeJapanese Unexamined Patent Application, First Publication No.2000-63225; and Japanese Unexamined Patent Application, FirstPublication No. 2003-226611). However, Japanese Unexamined PatentApplication, First Publication No. 2000-63225 and Japanese UnexaminedPatent Application, First Publication No. 2003-226611 fail to describeapplication of various types of powders to surface treatments.

DISCLOSURE OF INVENTION Technical Problems

The present invention has been made in view of the circumstances of theaforementioned prior art. The objective of the present invention is toprovide a surface-treatment agent for powders for use in cosmetics whichis safe without generating hydrogen, exhibits good compatibility withother cosmetic raw materials, and therefore, can improve the stabilityof the formulation in cosmetics, as well as which can provide good waterresistance, sebum resistance, glossiness, tactile sensation, and/oradhesive properties to hair and/or skin to the cosmetics, and the like;as well as provide a cosmetic formed by blending cosmetic powderssurface-treated with the aforementioned surface-treatment agent, whichexhibits superior surface-protective properties, a superior outerappearance and/or a superior sensation during use.

Technical Solution

The objective of the present invention can be achieved by asurface-treatment agent of powders for use in cosmetics comprising apolymer having a carbosiloxane dendrimer structure presented by thefollowing formula (1):

whereinZ is a divalent organic group;p is 0 or 1;each of R¹ and R² independently represents an alkyl group, an aryl groupor an aralkyl group, having 1 to 10 carbon atoms; andL¹ is a silylalkyl group, in the case of i=1, represented by thefollowing formula (2):

whereinZ and p are the same as defined above;R¹ and R² are the same as defined above;i is an integer ranging from 1 to 10, which specifies the total numberof generations of the aforementioned silylalkyl group;L^(i+1) is a group selected from the group consisting of a hydrogenatom, alkyl, aryl and aralkyl groups, having 1 to 10 carbon atoms andthe aforementioned silylalkyl group, with the proviso that in the caseof i=c, in which c is an integer ranging from 1 to 10 and specifiesgeneration of the aforementioned silylalkyl group, L^(i+1) is a hydrogenatom, or an alkyl, aryl or aralkyl group, having 1 to 10 carbon atoms;and in the case of i<c, L^(i+1) is the aforementioned silylalkyl group;anda^(i) is an integer ranging from 0 to 3.

The aforementioned polymer is preferably a copolymer of at least,

(A) an unsaturated monomer having a carbosiloxane dendrimer structurepresented by the following formula (1):

whereinZ is a divalent organic group;p is 0 or 1;each of R¹ and R² independently represents an alkyl group, an aryl groupor an aralkyl group, having 1 to 10 carbon atoms; andL¹ is a silylalkyl group, in the case of i=1, represented by thefollowing formula (2):

whereinZ and p are the same as defined above;R¹ and R² are the same as defined above;i is an integer ranging from 1 to 10, which specifies the total numberof generations of the aforementioned silylalkyl group;L^(i+1) is a group selected from the group consisting of a hydrogenatom, alkyl, aryl and aralkyl groups, having 1 to 10 carbon atoms andthe aforementioned silylalkyl group, with the proviso that in the caseof i=c, in which c is an integer ranging from 1 to 10 and specifiesgeneration of the aforementioned silylalkyl group, L^(i+1) is a hydrogenatom, or an alkyl, aryl or aralkyl group, having 1 to 10 carbon atoms;and in the case of i<c, L^(i+1) is the aforementioned silylalkyl group;anda^(i) is an integer ranging from 0 to 3, and(B) an unsaturated monomer having at least one silicon-bonding alkoxygroup.

The aforementioned unsaturated monomer having the carbosiloxanedendrimer structure (A) preferably has a group selected from the groupconsisting of an acryl or methacryl group-containing organic grouprepresented by the following general formula:

wherein R⁴ is a hydrogen atom or a methyl group; and R⁵ is an alkylenegroup having 1 to 10 carbon atoms, or

wherein R⁴ and R⁵ are the same as defined above,an alkenylaryl group-containing organic group represented by thefollowing general formula:

wherein R⁶ is a hydrogen atom or a methyl group; R⁷ is an alkyl grouphaving 1 to 10 carbon atoms; R⁸ is an alkylene group having 1 to 10carbon atoms; b is an integer ranging from 0 to 4; andc is 0 or 1,and an alkenyl group having 2 to 10 carbon atoms.

The aforementioned polymer may be a product obtained by copolymerizingthe aforementioned monomers further with (C) at least one unsaturatedmonomer having no silicon-bonding alkoxy group. The aforementioned otherunsaturated monomer preferably has a C₁₋₆ lower alkyl group.

In addition, the objective of the present invention can be finallyachieved by powders surface-treated with the aforementionedsurface-treatment agent for powders for use in a cosmetic, as well as acosmetic containing the aforementioned powders.

The cosmetic of the present invention can further comprise an oil agentor agents.

The aforementioned oil agent can be a silicone oil, and theaforementioned silicone oil can be a hydrophobic silicone oil having aviscosity ranging from 0.65 to 100,000 mm²/s at 25° C.

In addition, the aforementioned silicone oil can be anorganopolysiloxane represented by the following general formula (3), (4)or (5):

whereinR⁹ is a hydrogen atom, a hydroxyl group or a group selected frommonovalent non-substituted or fluorine- or amino-substituted C₁₋₃₀ alkylgroups, aryl groups, alkoxy groups and groups represented by(CH₃)₃SiO{(CH₃)₂SiO}₁Si (CH₃)₂CH₂CH₂—, wherein 1 is an integer rangingfrom 0 to 1,000;a′ is an integer ranging from 0 to 3;b′ is an integer ranging from 0 to 1,000; andc′ is an integer ranging from 0 to 1,000, with the proviso that1≦b′+c′≦2,000,

whereinR⁹ is the same as defined above;d is an integer ranging from 0 to 8; ande is an integer ranging from 0 to 8, with the proviso that 3≦d+e≦8,

R⁹ _((4-f))Si(OSiCH₃)_(g)  (5)

whereinR⁹ is the same as defined above;f is an integer ranging from 1 to 4; andg is an integer ranging from 0 to 500.

The cosmetic of the present invention can further comprise at least onesurfactant selected from the group consisting of anionic surfactants,cationic surfactants, nonionic surfactants, amphoteric surfactants andsemi-polar surfactants.

The cosmetic of the present invention can further comprise at least onepowder and/or at least one coloring agent. The aforementioned powder canbe selected from the group consisting of inorganic pigment powders,organic pigment powders and resin powders, having an average particlesize ranging from 1 nm to 20 μm. At least one part of the aforementionedpowder and/or the aforementioned coloring agents may be subjected to awater-repellent treatment by means of a surface-treatment agent otherthan the surface-treatment agent for powders for use in a cosmetic ofthe present invention.

The cosmetic of the present invention can further comprise at least oneselected from the group consisting of water-soluble polymers,oil-soluble gelling agents and organo-modified clay minerals.

The cosmetic of the present invention can further comprise at least oneselected from the group consisting of silicone resins, siliconeelastomers and organo-modified silicones.

The cosmetic of the present invention can further comprise at least oneUV-ray protective component.

The present invention also relates to a skin care product, a hairproduct, an antiperspirant product, a deodorant product, a makeupproduct or a UV-ray protective product, containing the aforementionedcosmetic.

ADVANTAGEOUS EFFECTS OF THE INVENTION

The surface-treatment agent for powders for use in cosmetics of thepresent invention can be suitably used in order to provide waterrepellency to powders for use in cosmetics, and the surface-treatmentagent is safe since hydrogen does not generate. In addition, thesurface-treatment agent for powders for use in cosmetics of the presentinvention uses a polymer in which a silicone which is not a linear one,but a highly-branched dendrimer one is grafted on the main chain. Forthis reason, the surface-treatment agent exhibits good compatibilitywith various other cosmetic raw materials, and therefore, superiorstability in blending in a cosmetic can be exhibited. In particular, inthe case of using a copolymer obtained by using the aforementionedunsaturated monomer having at least one silicon-bonding alkoxy group(B), superior water repellency, safety and formulation stability can beparticularly obtained. In addition, powders surface-treated with thesurface-treatment agent of powders for use in cosmetics of the presentinvention can provide good water resistance, sebum resistance,glossiness, tactile sensation, adhesive properties to hair and/or skinor the like to cosmetics.

The cosmetic of the present invention comprises the aforementionedcosmetic powders surface-treated with the aforementionedsurface-treatment agent. For this reason, superior surface protectiveproperties in view of water resistance, sebum resistance, glossiness,tactile sensation, and/or adhesive properties with respect to the hairand skin, as well as superior outer appearance and/or a superiorsensation during use can be provided.

BRIEF DESCRIPTION OF DRAWINGS

[FIG. 1] Graph showing results of rheology measurement in Evaluation 2.

BEST MODES FOR CARRYING OUT THE INVENTION

The surface-treatment agent for powders for use in a cosmetic of thepresent invention comprises a polymer having a carbosiloxane dendrimerstructure represented by the following formula (1):

wherein

Z is a divalent organic group;

p is 0 or 1;

each of R¹ and R² independently represents an alkyl, aryl or aralkylgroup, having 1 to 10 carbon atoms; and

L¹ is a silylalkyl group, in the case of i=1, represented by thefollowing formula (2):

whereinZ and p are the same as defined above;R¹ and R² are the same as defined above;i is an integer ranging from 1 to 10, preferable ranging from 1 to 5,more preferably ranging from 1 to 3 and is further preferably 1 or 2,which specifies the total number of generations of the aforementionedsilylalkyl group;L^(i+1) is a group selected from the group consisting of a hydrogenatom, alkyl, aryl and aralkyl groups, having 1 to 10 carbon atoms andthe aforementioned silylalkyl group, with the proviso that in the caseof i=c in which c is an integer ranging from 1 to 10, preferably rangingfrom 1 to 5, more preferably ranging from 1 to 3 and being furtherpreferably 1 or 2, and specifying generation of the aforementionedsilylalkyl group, L^(i+1) is a hydrogen atom, an alkyl, aryl or aralkylgroup, having 1 to 10 carbon atoms; and in the case of i<c, L^(i+1) isthe aforementioned silylalkyl group; anda^(i) is an integer ranging from 0 to 3, preferably ranging from 0 to 2,more preferably ranging from 0 to 1 and being further preferably 0. Theaforementioned polymer preferably has a vinyl polymerization unit as amain chain, and has a carbosiloxane dendrimer structure present at aside chain or side chains.

The aforementioned polymer of the present invention is preferably acopolymer of at least,

(A) an unsaturated monomer having a carbosiloxane dendrimer structurerepresented by the following formula (1):

whereinZ is a divalent organic group;p is 0 or 1;each of R¹ and R² independently represents an alkyl, aryl or aralkylgroup, having 1 to 10 carbon atoms; andL¹ is a silylalkyl group, in the case of i=1, represented by thefollowing formula (2):

whereinZ and p are the same as defined above;R¹ and R² are the same as defined above;i is an integer ranging from 1 to 10, preferably ranging from 1 to 5,more preferably ranging from 1 to 3 and is further preferably 1 or 2,which specifies the total number of generations of the aforementionedsilylalkyl group;L^(i+1) is a group selected from the group consisting of a hydrogenatom, alkyl, aryl and aralkyl groups, having 1 to 10 carbon atoms andthe aforementioned silylalkyl group, with the proviso that in the caseof i=c in which c is an integer ranging from 1 to 10, preferable rangingfrom 1 to 5, more preferably ranging from 1 to 3 and being furtherpreferably 1 or 2, and specifying generation of the aforementionedsilylalkyl group, L^(i+1) is a hydrogen atom, an alkyl, aryl or aralkylgroup, having 1 to 10 carbon atoms; and in the case of i<c, L^(i+1) isthe aforementioned silylalkyl group; anda^(i) is an integer ranging from 0 to 3, preferably ranging from 0 to 2,more preferably ranging from 0 to 1 and being further preferably 0, and(B) an unsaturated monomer having at least one silicon-bonding alkoxygroup.

The ratio of the aforementioned unsaturated monomer having acarbosiloxane dendrimer structure (A) and the unsaturated monomer havingat least one silicon-bonding alkoxy group (B) is not particularlyrestricted. The ratio of (weight of component (A))/(weight of all themonomers) preferably ranges from 0.02 to 0.7, more preferably rangesfrom 0.1 to 0.6 and further preferably ranges from 0.2 to 0.5. The ratioof (weight of component (B))/(weight of all the monomers) is preferably0 or more, but less than 0.5, preferably ranges from 0.05 to 0.4 andmore preferably ranges from 0.1 to 0.3.

The divalent organic group is not particularly restricted, and examplesthereof include, for example, a substituted or non-substituted, andlinear or branched divalent hydrocarbon group having 1 to 30 carbonatoms. As examples of the substituted or non-substituted, and linear orbranched divalent hydrocarbon group having 1 to 30 carbon atoms, mentionmay be made of, for example, linear or branched alkylene groups having 1to 30 carbon atoms such as a methylene group, a dimethylene group, atrimethylene group, a tetramethylene group, a pentamethylene group, ahexamethylene group, a heptamethylene group, an octamethylene group andthe like; alkenylene groups having 2 to 30 carbon atoms such as avinylene group, an allylene group, a butenylene group, a hexenylenegroup, an octenylene group and the like; arylene groups having 6 to 30carbon atoms such as a phenylene group, a diphenylene group and thelike; alkylenearylene groups having 7 to 30 carbon atoms such as adimethylenephenylene group and the like; and substituted groups thereofin which hydrogen atoms bonded to carbon atoms of the aforementionedgroups are at least partially substituted by a halogen atom such as afluorine atom or the like, or an organic group containing a carbinolgroup, an epoxy group, a glycidyl group, an acyl group, a carboxylgroup, an amino group, a methacryl group, a mercapto group, an amidegroup, an oxyalkylene group or the like. The divalent hydrocarbon groupis preferably a non-substituted divalent saturated hydrocarbon grouphaving 1 to 30 carbon atoms, more preferably a linear or branchedalkylene group having 1 to 6 carbon atoms, and in particular, preferablya dimethylene group.

For example, the divalent organic group may be a group selected from thefollowing groups:

—R³—

—R³—CO—

—R³—COO—R³—

—CO—R³—

—R³—COO—R^(3′)—

—R³—CONH—R^(3′)—

—R³—R^(3′)—

whereinR³ is the aforementioned substituted or non-substituted, and linear orbranched divalent hydrocarbon group having 1 to 30 carbon atoms, whichmay have a substituent as described above; andR^(3′) is a group selected from the following groups:

A divalent organic group represented by the following general formula:—R³— or —R³—R^(3′)— which is derivable by means of a reaction between ahydrogen atom bonded to a silicon atom and an alkenyl group ispreferred.

In the same manner as described above, a divalent organic grouprepresented by the following general formula: —R³—COO—R³— or—R³—COO—R^(3′)— which is derivable by means of a reaction between ahydrogen atom bonded to a silicon atom and an unsaturated carboxylicacid functional group is also preferred.

In particular, the aforementioned Z is preferably a linear or branchedalkylene group having 1 to 30 carbon atoms, and particularly preferablya dimethylene group (ethylene group).

As examples of alkyl groups, aryl groups, or aralkyl groups, having 1 to10 carbon atoms, mention may be made of, for example, linear or branchedalkyl groups having 1 to 10 carbon atoms such as a methyl group, anethyl group, a propyl group, a butyl group, a pentyl group, a hexylgroup, a heptyl group, an octyl group and the like; cycloalkyl groupshaving 3 to 10 carbon atoms such as a cylopentyl group, a cyclohexylgroup and the like; aryl groups having 6 to 10 carbon atoms such as aphenyl group, a tolyl group, a xylyl group and the like; aralkyl groupshaving 7 to 10 carbon atoms such as a benzyl group and the like; andsubstituted groups thereof in which hydrogen atoms bonded to carbonatoms of the aforementioned groups are at least partially substituted bya halogen atom such as a fluorine atom or the like, or an organic groupcontaining a carbinol group, an epoxy group, a glycidyl group, an acylgroup, a carboxyl group, an amino group, a methacryl group, a mercaptogroup, an amide group, an oxyalkylene group or the like. The alkylgroup, aryl group or aralkyl group is preferably an unsubstituted alkyl,aryl or aralkyl group, having 1 to 10 carbon atoms, more preferably anunsubstituted alkyl or aryl group having 1 to 6 carbon atoms, and inparticular, preferably a methyl group, an ethyl group or a phenyl group.

The aforementioned carbosiloxane dendrimer structure is a chemicalstructure radially and highly branched from one silicon atom. Theaforementioned “i” specifying the total number of generations of theaforementioned silylalkyl group indicates the degree of branching. Forexample, in the case in which the total number of generations i is 1 andL^(i+1) is, for example, a methyl group, the aforementionedcarbosiloxane dendrimer structure means the following structure.

wherein Z, p, R¹ and R² are the same as defined above; and a¹ is aninteger ranging from 0 to 3.

In the same manner as described above, in the case in which thegeneration i is 2 and L^(i+1) is, for example a methyl group, theaforementioned carbosiloxane dendrimer structure means the followingstructure, wherein p=1.

wherein Z, R¹ and R² are the same as defined above; and a¹ and a²indicate an integer ranging from 0 to 3.

In addition, in the case in which the generation i is 3 and L^(i+1) is,for example, a methyl group, the aforementioned carbosiloxane dendrimerstructure means the following structure wherein p=1.

wherein Z, R¹ and R² are the same as defined above; and a¹, a² and a³indicate an integer ranging from 0 to 3.

As the aforementioned carbosiloxane dendrimer structures, in particular,the following structures are preferred.

wherein Z and R² are the same as defined above.

wherein Z and R² are the same as defined above.

The silylalkyl group having the aforementioned carbosiloxane dendrimerstructure has a structure in which the carbosiloxane units are extendedin the form of a dendrimer. For this reason, the aforementionedsilylalkyl group is a functional group exhibiting increased waterrepellency (increased water resistance), as compared to linear or simplybranched polysiloxane units. In addition, the aforementioned silylalkylgroup having the carbosiloxanedendrimer structure is chemically stable,and for this reason, the silylalkyl group is a functional groupproviding advantageous properties such as usability in combination withvarious types of raw materials for use in cosmetics.

The aforementioned unsaturated monomer having the carbosiloxanedendrimer structure (A) is represented by, for example, the followingformula (1′):

whereinY is a radically-polymerizable unsaturation-containing group; andZ, p, R¹, R², L¹ and a^(i) are the same as defined above.

The aforementioned unsaturation-containing group is not particularlyrestricted as long as the group has a radically polymerizableunsaturation. As examples thereof, mention may be made of, for example,a vinyl group, an allyl group, a (meth)acryl group and the like.

The aforementioned unsaturated monomer having the carbosiloxanedendrimer structure (A) preferably has a group selected from the groupconsisting of an acryl or methacryl group-containing organic grouprepresented by the following general formula:

wherein R⁴ is a hydrogen atom or a methyl group; and R⁵ is an alkylenegroup having 1 to 10 carbon atoms,or

wherein R⁴ and R⁵ are the same as defined above, an alkenylarylgroup-containing organic group represented by the following generalformula:

wherein R⁶ is a hydrogen atom or a methyl group; R⁷ is an alkyl grouphaving 1 to 10 carbon atoms; R⁸ is an alkylene group having 1 to 10carbon atoms; b is an integer ranging from 0 to 4; and c is 0 or 1,and an alkenyl group having 2 to 10 carbon atoms.

As examples of the aforementioned unsaturated monomers having thecarbosiloxane dendrimer structure (A), mention may be made of, forexample, those represented by the following formulae:

The aforementioned unsaturated monomer having the carbosiloxanedendrimer structure (A) can be produced in accordance with, for example,a method for producing a branched siloxane/silalkylene copolymerdescribed in Japanese Unexamined Patent Application, First PublicationNo. H11-1530 (Japanese Patent Application No. H09-171154). For example,a silicon compound containing hydrogen atoms bonded to silicon atomsrepresented by the following general formula:

Y—Si—(OSiR² ₂H)₃

wherein Y and R² are the same as defined above, and an alkenylgroup-containing organic silicon compound are subjected to ahydrosilylation reaction. As the silicon compound represented by theaforementioned formula, for example, 3-methacryloxypropyltris(dimethylsiloxy)silane, 3-acryloxypropyl tris(dimethylsiloxy)silane,or 4-vinylphenyl tris(dimethylsiloxy)silane is used. As the organicsilicon compound containing an alkenyl group, for example, vinyltris(trimethylsiloxy)silane, vinyl tris(dimethylphenylsiloxy)silane, or5-hexenyl tris(trimethylsiloxy)silane is used. The aforementionedhydrosilylation reaction is preferably carried out in the presence of atransition metal catalyst such as chloroplatinic acid, aplatinum-vinylsiloxane complex or the like.

The unsaturated monomer having at least one silicon-bonding alkoxy group(B) is not particularly restricted as long as a linear or branchedalkoxy group having 1 to 22 carbon atoms, preferably having 1 to 12carbon atoms, more preferably having 1 to 6 carbon atoms, furthermorepreferably having 1 to 3 carbon atoms, and in particular, preferablyhaving 1 or 2 carbon atoms and a radically-polymerizableunsaturation-containing group are possessed. The aforementioned alkoxygroup may be either a non-substituted alkoxy group or an alkoxy group inwhich hydrogen atoms bonding to carbon atoms are at least partiallysubstituted by a halogen atom such as a fluorine atom or the like, or anorganic group containing a carbinol group, an epoxy group, a glycidylgroup, an acyl group, a carboxyl group, an amino group, a methacrylgroup, a mercapto group, an amide group, an oxyalkylene group or thelike. As examples of the aforementioned alkoxy group, mention may bemade of a methoxy group, an ethoxy group, a propoxy group, a butoxygroup and the like. A methoxy group or an ethoxy group is preferred. Thenumber of the alkoxy groups bonding to a silicon atom is in the range of1 to 3, is preferably 2 or 3 and is more preferably 3.

As examples of radically-polymerizable unsaturation-containing groups,mention may be made of groups derived from monovalent unsaturatedcarboxylic acids, or monovalent hydrocarbon groups having acarbon-carbon double bond at the molecular terminal as the unsaturationbond. For example, a vinyl group, an allyl group, a (meth)acryl group, a(meth)acryloxy group and the like may be mentioned.

As examples of the aforementioned unsaturated monomer having at leastone silicon-bonding alkoxy group (B), mention may be made of, forexample, methacryloxypropyl triethoxysilane, acryloxypropyltriethoxysilane, methacryloxypropyl trimethoxysilane, acryloxypropyltrimethoxysilane, vinyltriethoxysilane, vinyltrimethoxysilane,vinyltris(2-methoxyethoxy)silane and the like.

The aforementioned copolymer can be synthesized by copolymerizing theaforementioned unsaturated monomer having a carbosiloxane dendrimerstructure (A) and the aforementioned unsaturated monomer having at leastone silicon-bonding alkoxy group (B). In the copolymer in which thealkoxy group bonded to a silicon atom (alkoxysilyl group) is grafted onthe main chain, durability of water repellency of powders which aresubjected to a surface treatment is effectively improved, and thesurface properties such as stability over time and the like areimproved. For this reason, the aforementioned copolymer is preferablyused. The copolymerization ratio with the aforementioned unsaturatedmonomer having at least one silicon-bonding alkoxy group (B) is notparticularly restricted. The ratio of (weight of component (A))/(weightof all the monomers) preferably ranges from 0.02 to 0.70, morepreferably ranges from 0.1 to 0.65, and further preferably ranges from0.2 to 0.6. The ratio of (weight of component (B))/(weight of all themonomers) preferably ranges from 0 to 0.5, more preferably ranges from0.05 to 0.45, and further preferably ranges from 0.1 to 0.4.

In addition to the aforementioned components (A) and (B), (C) at leastone unsaturated monomer having no silicon-bonding alkoxy group may becopolymerized. As examples of the aforementioned unsaturated monomershaving no silicon-bonding alkoxy group (C), mention may be made of, forexample, (lower alkyl)acrylates or methacrylates such as methylacrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate,n-propyl acrylate, n-propyl methacrylate, isopropyl acrylate, isopropylmethacrylate and the like; glycidyl acrylate and glycidyl methacrylate;(lower alkyl)acrylates or methacrylates having C₁₋₆ lower alkyl groupssuch as n-butyl acrylate, n-butyl methacrylate, isobutyl acrylate,isobutyl methacrylate, tert-butyl acrylate, tert-butyl methacrylate,n-hexyl acrylate, n-hexyl methacrylate, cyclohexyl acrylate, cyclohexylmethacrylate, and the like; (higher alkyl)acrylates or methacrylatessuch as 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, octylacrylate, octyl methacrylate, lauryl acrylate, lauryl methacrylate,stearyl acrylate, stearyl methacrylate and the like; lower fatty acidvinyl esters such as vinyl acetate, vinyl propionate and the like;higher fatty acid esters such as vinyl butyrate, vinyl caproate, vinyl2-ethylhexanoate, vinyl laurate, vinyl stearate and the like; aromaticvinyl-type monomers such as styrene, vinyltoluene, benzyl acrylate,benzyl methacrylate, phenoxyethyl acrylate, phenoxyethyl methacrylate,vinylpyrrolidone and the like; amino group-containing vinyl-basedmonomers such as dimethylaminoethyl acrylate, dimethylaminoethylmethacrylate, diethylaminoethyl acrylate, diethylaminoethyl methacrylateand the like; amide group-containing vinyl-type monomers such asacrylamide, methacrylamide, N-methylolacrylamide,N-methylolmethacrylamide, N-methoxymethylacrylamide,N-methoxymethylmethacrylamide, isobutoxymethoxyacrylamide,isobutoxymethoxymethacrylamide, N,N-dimethylacrylamide,N,N-dimethylmethacrylamide and the like; hydroxyl group-containingvinyl-type monomers such as hydroxyethyl acrylate, hydroxyethylmethacrylate, hydroxypropyl alcohol acrylate, hydroxypropyl alcoholmethacrylate and the like; carboxylic acid-containing vinyl-typemonomers such as acrylic acid, methacrylic acid, itaconic acid, crotonicacid, fumaric acid, maleic acid and the like; ether bond-containingvinyl-type monomers such as tetrahydrofurfuryl acrylate,tetrahydrofurfuryl methacrylate, butoxyethyl acrylate, butoxyethylmethacrylate, ethoxy diethylene glycol acrylate, ethoxy diethyleneglycol methacrylate, polyethylene glycol acrylate, polyethylene glycolmethacrylate, polypropylene glycol monoacrylate, polypropylene glycolmonomethacrylate, hydroxybutyl vinyl ether, cetyl vinyl ether,2-ethylhexyl vinyl ether and the like; unsaturated group-containingsilicone compounds such as polydimethylsiloxane containing an acrylgroup or a methacryl group at one terminal, polydimethylsiloxane havingan alkenylaryl group at one terminal and the like; butadiene; vinylchloride; vinylidene chloride; acrylonitrile, methacrylonitrile; dibutylfumalate; maleic anhydride; dodecylsuccinic anhydride; acryl glycidylether, methacryl glycidyl ether, 3,4-epoxycylcohexylmethyl acrylate,3,4-epoxycyclohexylmethyl methacrylate; alkali metal salts, ammoniumsalts, and organic amine salts of radically-polymerizable unsaturatedcarboxylic acids such as acrylic acid, methacrylic acid, itaconic acid,crotonic acid, fumaric acid, maleic acid and the like;radically-polymerizable unsaturated monomers having a sulfonic acidgroup such as styrene sulfonic acid and the like and alkali metal salts,ammonium salts organic amine salts thereof; quaternary ammonium saltsderived from acrylic acids or methacrylic acids such as2-hydroxy-3-methacryloxypropyl trimethylammonium chloride and the like;methacrylic esters of alcohols having tertiary amine groups such asmethacrylic acid diethylamine ester and quaternary ammonium saltsthereof. A lower alkyl acrylate or methacrylate having a C₁₋₆ loweralkyl group is preferred.

In addition, a polyfunctional vinyl-based monomer can also be used. Asexamples thereof, mention may be made of, for example, unsaturatedgroup-containing silicone compounds such as trimethylolpropanetriacrylate, trimethylolpropane trimethacrylate, pentaerythritoltriacrylate, pentaerythritol trimethacrylate, ethylene glycoldiacrylate, ethylene glycol dimethacrylate, tetraethylene glycoldiacrylate, tetraethylene glycol dimethacrylate, polyethylene glycoldiacrylate, polyethylene glycol dimethacrylate, 1,4-butanedioldiacrylate, 1,4-butanediol dimethacrylate, 1,6-hexanediol diacrylate,1,6-hexanediol dimethacrylate, neopentylglycol diacrylate,neopentylglycol dimethacrylate, trimethylolpropane trioxyethylacrylate,trimethylolpropane trioxyethylmethacrylate, tris(2-hydroxyethyl)isocyanurate diacrylate, tris(2-hydroxyethyl) isocyanuratedimethacrylate, tris(2-hydroxyethyl) isocyanurate triacrylate,tris(2-hydroxyethyl) isocyanurate trimethacrylate, polydimethylsiloxanehaving both molecular-chain terminals capped with alkenylaryl groups andthe like.

In addition, a vinyl-based monomer containing a fluorinated organicgroup may be used. The aforementioned vinyl-based monomer containing afluorinated organic group is preferably one represented by the followinggeneral formula: CH₂═CR¹⁵COOR^(f). In the aforementioned formula, R¹⁵ isa hydrogen atom or a methyl group and R^(f) is a fluorinated organicgroup, and as examples thereof, mention may be made of a fluoroalkylgroup or a fluoroalkyloxyfluoroalkylene group as described above. Asexamples of the aforementioned components (A), the compounds representedby the following formulae may be mentioned. In the following formulae, zis an integer ranging from 1 to 4. CH₂═CCH₃COO—CF₃, CH₂—CCH₃COO—C₂F₅,CH₂═CCH₃COO-nC₃F₇, CH₂═CCH₃COO—CF (CF₃)₂, CH₂═CCH₃COO-nC₄F₉,CH₂═CCH₃COO—CF₂CF(CF₃)₂, CH₂═CCH₃COO-nC₅F₁₁, CH₂═CCH₃COO-nC₈F₁₃,CH₂═CCH₃COO-nC₈F₁₇, CH₂═CCH₃COO—CH₂CF₃, CH₂═CCH₃COO—CH(CF₃)₂,CH₂═CCH₃COO—CH₂CH(CF₃)₂, CH₂═CCH₃COO—CH₂ (CF₂)₂F, CH₂═CCH₃COO—CH₂(CF₂)₃F, CH₂═CCH₃COO—CH₂ (CF₂)₄F, CH₂═CCH₃COO—CH₂ (CF₂)₆F,CH₂═CCH₃COO—CH₂ (CF₂)₈F, CH₂═CCH₃COO—CH₂CH₂CF_(3r) CH₂═CCH₃COO—CH₂CH₂(CF₂)₂F, CH₂═CCH₃COO—CH₂CH₂ (CF₂)₃F, CH₂═CCH₃COO—CH₂CH₂ (CF₂)₄F,CH₂═CCH₃COO—CH₂CH₂ (CF₂)₆F, CH₂═CCH₃COO—CH₂CH₂ (CF₂)₈F,CH₂═CCH₃COO—CH₂CH₂ (CF₂)₁₀F, CH₂═CCH₃COO—CH₂CH₂ (CF₂)₁₂F,CH₂═CCH₃COO—CH₂CH₂ (CF₂)₁₄F, CH₂═CCH₃COO—CH₂CH₂ (CF₂)₁₆F,CH₂═CCH₃COO—CH₂CH₂CH₂CF₃, CH₂═CCH₃COO—CH₂CH₂CH₂ (CF₂)₂F,CH₂═CCH₃COO—CH₂CH₂CH₂ (CF₂)₂H, CH₂═CCH₃COO—CH₂ (CF₂)₄H,CH₂—CCH₃COO—CH₂CH₂ (CF₂)₃H, CH₂═CCH₃COO—CH₂CH₂CF (CF₃)—[OCF₂CF(CF₃)]_(z)—OC₃F₇,CH₂═CCH₃COO—CH₂CH₂CF₂CF₂—[OCF₂CF(CF₂)]_(z)—OC₃F₇CH₂═CHCOO—CF₂,CH₂═CHCOO—C₂F₅, CH₂═CHCOO-nC₃F₇, CH₂═CHCOO—CF (CF₃)₂, CH₂═CHCOO-nC₄F₉,CH₂═CHCOO—CF₂CF (CF₃)₂, CH₂═CHCOO-nC₅F₁₁, CH₂═CHCOO-nC₆F₁₃,CH₂═CHCOO-nC₈F₁₇, CH₂═CHCOO—CH₂CF₃, CH₂═CHCOO—CH(CF₃)₂,CH₂═CHCOO—CH₂CH(CF₃)₂, CH₂═CHCOO—CH₂ (CF₂)₂F, CH₂═CHCOO—CH₂ (CF₂)₃F,CH₂═CHCOO—CH₂ (CF₂)₄F, CH₂═CHCOO—CH₂ (CF₂)₆F, CH₂═CHCOO—CH₂ (CF₂)₈F,CH₂═CHCOO—CH₂CH₂CF₃, CH₂═CHCOO—CH₂CH₂ (CF₂)₂F, CH₂═CHCOO—CH₂CH₂ (CF₂)₃F,CH₂═CHCOO—CH₂CH₂ (CF₂)₄F, CH₂═CHCOO—CH₂CH₂ (CF₂)₆F, CH₂═CHCOO—CH₂CH₂(CF₂)₈F, CH₂═CHCOO—CH₂CH₂ (CF₂)₁₀F, CH₂═CHCOO—CH₂CH₂ (CF₂)₁₂F,CH₂═CHCOO—CH₂CH₂ (CF₂)₁₄F, CH₂═CHCOO—CH₂CH₂ (CF₂)₁₆F,CH₂═CHCOO—CH₂CH₂CH₂CF₃, CH₂═CHCOO—CH₂CH₂CH₂ (CF₂)₂F, CH₂═CHCOO—CH₂CH₂CH₂(CF₂)₂H, CH₂═CHCOO—CH₂ (CF₂)₄H, CH₂═CHCOO—CH₂CH₂ (CF₂)₃H,CH₂═CHCOO—CH₂CH₂CF(CF₃)—[OCF₂CF(CF₃)]_(z)—OC₃F₇, andCH₂═CHCOO—CH₂CH₂CF₂CF₂—[OCF₂CF(CF₃)]_(Z)—OC₃F₇. Among these, the vinylmonomers represented by the following formulae are preferred.

CH₂═CHCOO—CH₂CH₂ (CF₂)₆F, CH₂═CHCOO—CH₂CH₂ (CF₂)₈F, CH₂═CCH₃COO—CH₂CH₂(CF₂)₆F, CH₂═CCH₃COO—CH₂CH₂ (CF₂)₈F, CH₂═CHCOO—CH₂CF₃, andCH₂═CCH₃COO—CH₂CF₃.

In particular, the vinyl monomers represented by the following formulaeare more preferred.

CH₂═CHCOO—CH₂CF₃ and CH₂═CCH₃COO—CH₂CF₃.

The polymerization ratio of the aforementioned component (C) is notrestricted, and can be appropriately determined within the range of 0.01to 0.98 of the ratio of (weight of component (C))/(weight of all themonomers constituting the copolymer). The ratio of (weight of component(C))/(weight of all the monomers constituting the copolymer) preferablyranges from 0.01 to 0.75 and more preferably ranges from 0.20 to 0.60.

In particular, the copolymer blended in the surface-treatment agent forpowders for use in cosmetics of the present invention is preferablyobtained by copolymerizing the aforementioned unsaturated monomer havingthe carbosiloxane dendrimer structure (A), the unsaturated monomerhaving at least one silicon-bonding alkoxy group (B) and at least oneunsaturated monomer having no silicon-bonding alkoxy group (C) in aweight ratio satisfying the conditions of {(weight of component(A))/(weight of all the monomers)}:{(weight of component (B))/(weight ofall the monomers)}:{(weight of component (C))/(weight of all themonomers)} in the range of (0.02 to 0.7):(0.05 to 0.45):(0.01 to 0.75).The copolymer preferably satisfies the conditions of the aforementionedratio ranging from (0.02 to 0.7):(0.05 to 0.45):(0.01 to 0.75), and{(weight of component (A))/(weight of all the monomers)}≧{(weight ofcomponent (B))/(weight of all the monomers)}. In the copolymer obtainedin the aforementioned weight ratio, the silylalkyl group having thecarbosiloxane dendrimer structure and the alkoxy group bonding to asilicon atom are grafted on the main chain in the specified ratio. Forthis reason, the aforementioned copolymer has an advantage in thatdurability of water repellency of the surface-treated powders iseffectively improved, and the stability over time, surface properties,and sensation during use thereof can be further improved, as comparedwith copolymers having no silicon-bonding alkoxy group (no alkoxysilylgroup). For this reason, the copolymer is, in particular, preferablyused as the surface-treatment agent for powders for use in cosmetics ofthe present invention. In addition, a part or all parts of theaforementioned component (C) can most preferably be an unsaturatedmonomer having a C₁₋₆ lower alkyl group, and can provide the mostimprovements in stability over time, surface properties, and sensationduring use as the surface-treatment agent for powders for use incosmetics can be obtained.

As the copolymerization method, a radical polymerization method or anion polymerization method may be used. In particular, a radicalpolymerization method is preferred, and a solution polymerization methodis, in particular, preferably used. The aforementioned solutionpolymerization method is carried out by reacting the aforementionedunsaturated monomers in a solvent in the presence of a radical initiatorfor 3 to 20 hours under the temperature condition ranging from 50 to150° C. As examples of the solvents used herein, mention may be made ofaliphatic hydrocarbons such as hexane, octane, decane, cyclohexane andthe like; aromatic hydrocarbons such as benzene, toluene, xylene and thelike; ethers such as diethyl ether, dibutyl ether, tetrahydrofuran,dioxane and the like; ketones such as acetone, methyl ethyl ketone,methyl isobutyl ketone, diisobutyl ketone and the like; esters such asmethyl acetate, ethyl acetate, butyl acetate, isobutyl acetate and thelike; alcohols such as methanol, ethanol, isopropyl alcohol, butanol andthe like; organosiloxane oligomers such as octamethylcyclotetrasiloxane,decamethylcyclopentasiloxane, hexamethyldisiloxane,octamethyltrisiloxane and the like. As the radical initiator,conventionally known compounds generally used in radical polymerizationmethods can be employed. As examples thereof, mention may be made ofazobis-based compounds such as 2,2′-azobis(isobutyronitrile),2,2′-azobis(2-methylbutyronitrile),2,2′-azobis(2,4-dimethylvaleronitrile), dimethyl-2,2′-azobis(2-methylpropionate) and the like; and organic peroxides such as benzoylperoxide, lauroyl peroxide, tert-butyl peroxybenzoate, tert-butylperoxy-2-ethylhexanoate and the like. The aforementioned radicalinitiators may be used alone or in combination of two or more typesthereof. The usage amount of the radical initiator preferably rangesfrom 0.1 to 5 parts by weight with respect to 100 parts by weight of thetotal of the aforementioned component (A) to component (C). In addition,at the time of polymerization, a chain transfer agent can be added. Asexamples of the chain transfer agent, mention may be made of mercaptocompounds such as 2-mercaptoethanol, butylmercaptan, n-dbdecylmercaptan,3-mercaptopropyltrimethoxysilane, polydimethylsiloxane having amercaptopropyl group and the like; and halogenated products such asmethylene chloride, chloroform, carbon tetrachloride, butyl bromide,3-chloropropyltrimethoxysilane and the like.

After the polymerization, purification can be carried out by means of amethod in which the remaining unreacted vinyl-based monomers are removedby heating under reduced pressure or a method in which a deodoranttreatment due to a hydrogenation reaction without a solvent or with asolvent is carried out and light components are removed by distillationby contacting with a nitrogen gas under reduced pressure. In particular,in the case of using as an agent for external use in which reduction ofodors and miscibility with other cosmetic components are needed, apurified product obtained as described above is preferably used. In theaforementioned hydrogenation reaction and stripping step, solvents,reaction conditions, reducing pressure conditions and the like used inthe purification of the publicly known organopolysiloxane copolymers canbe used without any restrictions and can be freely selected.

In order to further improve adhesive properties of the vinyl-basedpolymer with respect to skin or hair, or provide appropriate cleansingproperties after use, an amino group may be introduced into the sidechain of the aforementioned vinyl-based polymer by using an aminogroup-containing vinyl-based monomer such as dimethylaminoethylacrylate, dimethylaminoethyl methacrylate, diethylaminoethyl acrylate,diethylaminoethyl methacrylate or the like at a part of theaforementioned component (C), followed by modifying this with an alkalimetal salt, an ammonium salt or an amine salt of a halogenated fattyacid such as a potassium salt of monochloroacetic acid, an ammonium saltof monochloroacetic acid, an aminomethylpropanol salt ofmonochloroacetic acid, a triethanolamine salt of monobromoacetic acid, asodium salt of monochloropropionic acid or the like. Alternatively, acarboxylic acid group may be introduced into the side chain of theaforementioned vinyl-based polymer by using a carboxylic acid-containingvinyl-based monomer such as acrylic acid, methacrylic acid, itaconicacid, crotonic acid, fumaric acid, maleic acid or the like at a part ofthe aforementioned component (C), followed by neutralizing this with anamine such as triethylamine, diethylamine, triethanolamine or the like.

The number average molecular weight of the aforementioned copolymerpreferably ranges from 3,000 to 2,000,000 and more preferably rangesfrom 5,000 to 800,000 in view of ease of blending in the cosmetics. Asexamples of the forms thereof, mention may be made of a liquid, a gum, apaste, a solid and a powder. At the time of blending in the cosmetics,the form of a solution or dispersion in which the copolymer is dilutedwith a solvent or a powder is preferred.

The aforementioned copolymer possesses a film-forming property, and afilm is formed on the surface of powders. Thereby, the surfaceproperties of the powders can change into water repellency. Therefore,the surface-treatment agent of the present invention can be preferablyused for making powders water repellent. In addition, hydrogen is notgenerated, and therefore, this is safe.

The surface-treatment agent of the present invention can suitably beused in a surface treatment of any powders for use in, in particular,cosmetics (containing powders and pigments used as coloring agents), andtreated powders exhibiting improved feeling on touch during use andpossessing superior water resistance, sebum resistance or the like canbe obtained. With respect to powders and/or coloring agents, there is norestriction on the form thereof (sphere, needle, plate or the like), theparticle size (aerosol, microparticle, pigment-grade, or the like), andthe particle structure (porous, non-porous or the like) thereof, and anyone thereof can be used, as long as the powders are commonly used incosmetics. As examples thereof, mention may be made of inorganicpowders, organic powders, surfactant metal salt powders, coloredpigments, pearl pigments, metal powder pigments, tar pigments, naturalpigments and the like. The aforementioned powders are preferably atleast one type of powders selected from inorganic powders, organicpowders, and resin powders, having an average particle size ranging from1 nm to 20 μm.

More particularly, as examples of inorganic powders, mention may be madeof titanium oxide, zirconium oxide, zinc oxide, cerium oxide, magnesiumoxide, barium sulfate, calcium sulfate, magnesium sulfate, calciumcarbonate, magnesium carbonate, talc, mica, kaolin, sericite, whitemica, synthetic mica, phlogopite, lepidolite, black mica, lithia mica,silicic acid, silicic acid anhydride, aluminum silicate, magnesiumsilicate, aluminum magnesium silicate, calcium silicate, bariumsilicate, strontium silicate, metal salts of tungstic acid,hydroxyapatite, vermiculite, higilite, bentonite, montmorillonite,hectorite, zeolite, ceramic powder, dicalcium phosphate, alumina,aluminum hydroxide, boron nitride, silica and the like.

As examples of organic powders, mention may be made of polyamide powder,polyester powder, polyethylene powder, polypropylene powder, polystyrenepowder, polyurethane powder, benzoguanamine powder,polymethylbenzoguanamine powder, tetrafluoroethylene powder, poly(methylmethacrylate) powder, cellulose, silk powder, nylon powder, nylon 12,nylon 6, silicone powder, copolymers of styrene and acrylic acid,copolymers of divinylbenzene and styrene, vinyl resin, urea resin,phenol resin, fluorine resin, silicon resin, acrylic resin, melamineresin, epoxy resin, polycarbonate resin, microcrystalline fiber powder,starch powder, lauroyl lysine and the like.

As examples of surfactant metal salt powders (metallic soaps), mentionmay be made of zinc stearate, aluminum stearate, calcium stearate,magnesium stearate, zinc myristate, magnesium myristate, zinccetylphosphate, calcium cetylphosphate, sodium zinc cetylphosphate, andthe like.

As examples of colored pigments, mention may be made of inorganic redpigments such as iron oxide, iron hydroxide, iron titanate and the like;inorganic brown pigments such as gamma-iron oxide and the like;inorganic yellow pigments such as yellow iron oxide, ocher, and thelike; inorganic black iron pigments such as black iron oxide, carbonblack and the like; inorganic purple pigments such as manganese violet,cobalt violet, and the like; inorganic green pigments such as chromiumhydroxide, chromium oxide, cobalt oxide, cobalt titanate, and the like;inorganic blue pigments such as Prussian blue, ultramarine blue, and thelike; laked tar pigments, laked natural pigments, and synthetic resinpowders in which the aforementioned powders are subjected tohybridization, and the like.

As examples of pearl pigments, mention may be made of titaniumoxide-coated mica, titanium oxide-coated mica, bismuth oxychloride,titanium oxide-coated bismuth oxychloride, titanium oxide-coated talc,fish scale foil, titanium oxide-coated colored mica, and the like.

As examples of metal powder pigments, mention may be made of powders ofmetals such as aluminum powder, copper powder, stainless steel powder,and the like.

As examples of tar pigments, mention may be made of Red No. 3, Red No.104, Red No. 106, Red No. 201, Red No. 202, Red No. 204, Red No. 205,Red No. 220, Red No. 226, Red No. 227, Red No. 228, Red No. 230, Red No.401, Red No. 505, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No.203, Yellow No. 204, Yellow No. 401, Blue No. 1, Blue No. 2, Blue No.201, Blue No. 404, Green No. 3, Green No. 201, Green No. 204, Green No.205, Orange No. 201, Orange No. 203, Orange No. 204, Orange No. 206,Orange No. 207 and the like.

As examples of natural pigments, mention may be made of carminic acid,laccaic acid, carthamin, brazilin, crocin and the like. Theaforementioned powders may be hybridized within a range which does notimpair the effects of the present invention, or may be made hydrophilicor hydrophobic with a general oil agent, a silicone oil, a fluorinecompound, a surfactant or the like. One type thereof or two or moretypes thereof may be used, if necessary.

In the case of surface-treating powders for use in cosmetics with thesurface-treatment agent for powders for use in cosmetics of the presentinvention, the treatment method can be carried out by means of, forexample, a dry method in which the surface-treatment agent for powdersfor use in cosmetics of the present invention and powders to be treatedare subjected to dry mixing, or a wet method in which thesurface-treatment agent for powders for use in cosmetics of the presentinvention is dispersed in a solvent, powders to be treated are furthermixed therewith to carry out wet mixing, followed by drying treatedpowders. The surface-treatment methods are not restricted thereto. Inaddition, the surface treatment can also be carried out as follows: thesurface-treatment agent for powders for use in cosmetics of the presentinvention is diluted with an oil agent or agents for use in cosmetics,and the obtained composition is mixed with powders to form a dispersionin the form of a slurry.

In the case of surface-treating powders for use in cosmetics with thesurface-treatment agent for powders for use in cosmetics of the presentinvention, a wet method is more preferred. In the wet method, the mixingtemperature is not particularly restricted, and preferably ranges from60 to 80° C. In addition, the mixing period varies in accordance withthe amount to be treated, types of powders and the like, and usuallyranges from 1 hour to 3 hours.

In the case of surface-treating powders for use in cosmetics with thesurface-treatment agent for powders for use in cosmetics of the presentinvention, the usage amount thereof varies in accordance with types ofthe powders, and usually, preferably ranges from 1 to 10% by weight, andmore preferably ranges from 1 to 5% by weight. If the usage amount isbelow 1% by weight, effects of improving feeling on touch and the likemay not be sufficiently obtained in the case of blending in a cosmetic.On the other hand, if the amount exceeds 10% by weight, impaired feelingon touch such as a heavy feeling during spreading and the like may beexhibited.

The cosmetic of the present invention contains powders for use incosmetics which are subjected to a surface treatment with theaforementioned surface-treatment agent for powders for use in cosmeticsof the present invention.

The blending amount of powders treated by the aforementionedsurface-treatment agent in a cosmetic is not particularly restricted.The cosmetic of the present invention can contain the aforementionedpowders in an amount ranging from 1 to 99% by weight on the basis of thetotal weight of the cosmetic. More particularly, the blending amount ofthe aforementioned powders can appropriately vary in accordance withtypes of cosmetics, such as in the range of 10 to 90% by weight, 20 to80% by weight or 30 to 70% by weight.

The cosmetic of the present invention can further comprise an oil agentor agents. As examples of the oil agents, mention may be made of animaloils, vegetable oils, synthetic oils and the like, which are generallyused in cosmetics. The aforementioned oil agents may be derived from anyorigins, may be in the form of a solid, a semi-solid, or a liquid, andmay be non-volatile, semi-volatile or volatile, as long as they arehydrophobic. The oil agents are used in order to provide lubricity toskin or hair, make skin flexible, and provide a moisturizing sensation.

As the aforementioned oil agents, silicone oils are preferred. Thesilicone oils are hydrophobic as long as they are oil agents, and themolecular structure thereof may be a cyclic, linear or branchedstructure. The viscosity of the silicone oils at 25° C. usually rangesfrom 0.65 to 100,000 mm²/s and preferably ranges from 0.65 to 10,000mm²/s.

As examples of the aforementioned silicone oils, mention may be made ofcyclic organopolysiloxanes, linear organopolysiloxanes, and branchedorganopolysiloxanes. Among these, volatile linear organopolysiloxanes,branched organopolysiloxanes, and cyclic organopolysiloxanes arepreferred.

As the aforementioned silicone oils, for example, organopolysiloxanesrepresented by the following general formula (3), (4) or (5):

whereinR⁹ is a hydrogen atom, a hydroxyl group or a group selected frommonovalent non-substituted or fluorine- or amino-substituted C₁₋₃₀ alkylgroups, aryl groups, alkoxy groups and groups represented by(CH₃)₃SiO{(CH₃)₂SiO}_(l)Si(CH₃)₂CH₂CH₂—, wherein l is an integer rangingfrom 0 to 1,000;a′ is an integer ranging from 0 to 3;b′ is an integer ranging from 0 to 1,000; andc′ is an integer ranging from 0 to 1,000, with the proviso that1≦b′+c′≦2,000,

whereinR⁹ is the same as defined above;d is an integer ranging from 0 to 8; ande is an integer ranging from 0 to 8, with the proviso that 3≦d+e≦8,

R^(9(4-f))Si(OSiCH₃)_(g)  (5)

whereinR⁹ is the same as defined above;f is an integer ranging from 1 to 4; andg is an integer ranging from 0 to 500,can be used.

As examples of monovalent, non-substituted or fluorine- oramino-substituted alkyl groups, aryl groups, and alkoxy groups, having 1to 30 carbon atoms, mention may be made of, for example, linear orbranched alkyl groups having 1 to 30 carbon atoms such as a methylgroup, an ethyl group, a propyl group, a butyl group, a pentyl group, ahexyl group, a heptyl group, an octyl group, a decyl group, a dodecylgroup and the like; cycloalkyl groups having 3 to 30 carbon atoms suchas a cylopentyl group, a cyclohexyl group and the like; aryl groupshaving 6 to 30 carbon atoms such as a phenyl group, a tolyl group, axylyl group, a naphthyl group and the like; alkoxy groups having 1 to 30carbon atoms such as a methoxy group, an ethoxy group, a propoxy groupand the like; and substituted groups thereof, in which hydrogen atomsbonded to carbon atoms of the aforementioned groups are at leastpartially substituted by a fluorine atom or an amino group. Anon-substituted alkyl group or aryl group is preferred, and anon-substituted alkyl group having 1 to 6 carbon atoms or aryl group isfurther preferred. A methyl group, an ethyl group or a phenyl group is,in particular, preferred.

More particularly, as examples of the silicone oils having theaforementioned structures, the following organopolysiloxanes may bementioned. As examples of cyclic organopolysiloxanes, mention may bemade of hexamethylcyclotrisiloxane (D3), octamethylcyclotetrasiloxane(D4), decamethylcyclopentasiloxane (D5), dodecamethylcyclohexasiloxane(D6), 1,1-diethylhexamethylcyclotetrasiloxane,phenylheptamethylcyclotetrasiloxane,1,1-diphenylhexamethylcyclotetrasiloxane,1,3,5,7-tetravinyltetramethylcyclotetrasiloxane,1,3,5,7-tetramethylcyclotetrasiloxane,1,3,5,7-tetracyclohexyltetramethylcyclotetrasiloxane,tris(3,3,3-trifluoropropyl)trimethylcyclotrisiloxane,1,3,5,7-tetra(3-methacryloxypropyl)tetramethylcyclotetrasilo xane,1,3,5,7-tetra(3-acryloxypropyl)tetramethylcyclotetrasiloxane,1,3,5,7-tetra(3-carboxypropyl)tetramethylcyclotetrasiloxane,1,3,5,7-tetra(3-vinyloxypropyl)tetramethylcyclotetrasiloxane,1,3,5,7-tetra(p-vinylphenyl)tetramethylcyclotetrasiloxane,1,3,5,7-tetra[3-(p-vinylphenyl)propyl]tetramethylcyclotetras iloxane,1,3,5,7-tetra(N-acryloyl-N-methyl-3-aminopropyl)tetramethylcyclotetrasiloxane,1,3,5,7-tetra(N,N-bis(lauroyl)-3-aminopropyl)tetramethylcyclotetrasiloxane and the like.

As examples of linear organopolysiloxanes, mention may be made of adimethylpolysiloxane in which both molecular terminals are capped withtrimethylsiloxy groups (dimethylsilicone with a low viscosity such as 2cst or 6 cst to dimethylsilicone with a high viscosity such as 1,000,000cst), an organohydrogenpolysiloxane, a methylphenylpolysiloxane in whichboth molecular terminals are capped with trimethylsiloxy groups, acopolymer of methylphenylsiloxane and dimethylsiloxane in which bothmolecular terminals are capped with trimethylsiloxy groups, adiphenylpolysiloxane in which both molecular terminals are capped withtrimethylsiloxy groups, a copolymer of diphenylsiloxane anddimethylsiloxane in which both molecular terminals are capped withtrimethylsiloxy groups, a trimethylpentaphenyltrisiloxane, aphenyl(trimethylsiloxy)siloxane, a methylalkylpolysiloxane in which bothmolecular terminals are capped with trimethylsiloxy groups, a copolymerof methylalkylsiloxane and dimethylpolysiloxane in which both molecularterminals are capped with trimethylsiloxy groups, a copolymer ofmethyl(3,3,3-trifluoropropyl)siloxane and dimethylsiloxane in which bothmolecular terminals are capped with trimethylsiloxy groups, anα,ω-dihydroxypolydimethylsiloxane, an α,ω-diethoxypolydimethylsiloxane,a 1,1,1,3,5,5,5-heptamethyl-3-octyltrisiloxane, a1,1,1,3,5,5,5-heptamethyl-3-dodecyltrisiloxane, a1,1,1,3,5,5,5-heptamethyl-3-hexadecyltrisiloxane, atristrimethylsiloxymethylsilane, a tristrimethylsiloxyalkylsilane, atetrakistrimethylsiloxysilane, tetramethyl-1,3-dihydroxydisiloxane, anoctamethyl-1,7-dihydroxytetrasiloxane, ahexamethyl-1,5-diethoxytrisiloxane, a hexamethyldisiloxane, anoctamethyltrisiloxane, a higher alkoxy-modified silicone, a higher fattyacid-modified silicone and the like.

As examples of branched organopolysiloxanes, mention may be made ofmethyltristrimethylsiloxysilane, ethyltristrimethylsiloxysilane,propyltristrimethylsiloxysilane, tetrakistrimethylsiloxysilane,phenyltristrimethylsiloxysilane and the like.

When at least one of the aforementioned silicone oils is contained inthe cosmetic of the present invention, the stability of the cosmeticover time can be improved, and a refreshing feeling on touch which thesilicone oils inherently possess can be realized.

The oil agents other than the silicone oils are preferably in the formof a liquid at 5 to 100° C. As the oil agents other than the siliconeoils, hydrocarbon oils and/or fatty acid ester oils are preferred. Theymay be used alone, but preferably used in combination with theaforementioned silicone oils. By using the aforementioned silicone oilsin combination with the hydrocarbon oils and/or fatty acid ester oils,advantages can be obtained in that moisture on the skin can bemaintained, and a moisturizing sensation (also referred to as“moisturizing feeling on touch”) such as moisturizing skin or hair andsmooth feeling on touch, in addition to the refreshing feeling on touchwhich the silicone oils inherently possess, can be provided incosmetics, and the stability over time of cosmetics is not impaired. Inaddition, use of the cosmetics containing the aforementioned siliconeoils in combination with the hydrocarbon oils and/or fatty acid esteroils provides advantages in that the aforementioned moisturizingcomponents can be stably and uniformly applied on the skin or hair, themoisturizing effects of the moisturizing components on the skin areincreased, and superior smoothness and moisturizing feeling can beprovided as compared with cosmetics containing only oil agents otherthan silicone oils (the hydrocarbon oils and/or fatty acid ester oils).

As examples of hydrocarbon oils, mention may be made of liquid paraffin,light liquid isoparaffin, heavy liquid isoparaffin, vaseline,n-paraffin, isoparaffin, isododecane, isohexadecane, polyisobutylene,hydrogenated polyisobutylene, polybutene, ozokerite, ceresin,microcrystalline wax, paraffin wax, polyethylene wax,polyethylene/polypropylene wax, squalane, squalene, pristane,polyisoprene and the like.

As examples of fatty acid ester oils, mention may be made of hexyldecyloctanoate, cetyl octanoate, isopropyl myristate, isopropyl palmitate,butyl stearate, hexyl laurate, myristyl myristate, oleyl oleate, decyloleate, octyldodecyl myristate, hexyldecyl dimethyloctanoate, cetyllactate, myristyl lactate, diethyl phthalate, dibutyl phthalate, lanolinacetate, ethylene glycol monostearate, propylene glycol monostearate,propylene glycol dioleate, glyceryl monostearate, glyceryl monooleate,glyceryl tri-2-hexanoate, trimethylolpropane tri-2-ethylhexanoate,ditrimethylolpropane triethylhexanoate, ditrimethylolpropaneisostearate/sebacate, trimethylolpropane trioctanoate,trimethylolpropane triisostearate, diisopropyl adipate, diisobutyladipate, 2-hexyldecyl adipate, di-2-heptylundecyl adipate, diisostearylmalate, hydrogenated castor oil monoisostearate, N-alkylglycolmonoisostearate, octyldodecyl isostearate, isopropyl isostearate,isocetyl isostearate, ethylene glycol di-2-ethylhexanoate, cetyl2-ethylhexanoate, pentaerythritol tetra-2-ethylhexanoate, octyldodecylgum ester, ethyl oleate, octyldodecyl oleate, neopentylglycol dicaprate,triethyl citrate, 2-ethylhexyl succinate, dioctyl succinate, isocetylstearate, diisopropyl sebacate, di-2-ethylhexyl sebacate, diethylsebacate, dioctyl sebacate, dibutyloctyl sebacate, cetyl palmitate,octyldodecyl palmitate, octyl palmitate, 2-ethylhexyl palmitate,2-hexyldecyl palmitate, 2-heptylundecyl palmitate, cholesteryl12-hydroxystearate, dipentaerythritol fatty acid ester, 2-hexyldecylmyristate, ethyl laurate, 2-octyldodecyl N-lauroyl-L-glutamate,di(cholesteryl/behenyl/octyldodecyl) N-lauroyl-L-glutamate,di(cholesteryl/octyldodecyl) N-lauroyl-L-glutamate,di(phytosteryl/behenyl/octyldodecyl) N-lauroyl-L-glutamate,di(phytosteryl/octyldodecyl) N-lauroyl-L-glutamate, isopropylN-lauroylsarcosinate, diisostearyl malate, neopentylglycol dioctanoate,isodecyl neopentanoate, isotridecyl neopentanoate, isostearylneopentanoate, isononyl isononanoate, isotridecyl isononanoate, octylisononanoate, isotridecyl isononanoate, diethylpentanedioldineopentanoate, methylpentanediol dineopentanoate, octyldodecylneodecanoate, 2-butyl-2-ethyl-1,3-propanediol dioctanoate,pentaerythrityl tetraoctanoate, dipentaerythrityl hydrogenated rosin,pentaerythrityl triethylhexanoate, dipentaerythrityl(hydroxystearate/stearate/rosinate), polyglyceryl tetraisostearate,polyglyceryl-10 nonaisostearate, polyglyceryl-8deca(erucate/isostearate/ricinoleate), (hexyldecanoic acid/sebacicacid)diglyceryl oligoester, glycol distearate (ethyleneglycoldistearate), diisopropyl dimmer dilinoleate, diisostearyl dimmerdilinoleate, di(isostearyl/phytosteryl)dimmer dilinoleate,(phytosteryl/behenyl)dimmer dilinoleate,(phytosteryl/isostearyl/cetyl/stearyl/behenyl) dimmer dilinoleate,dimmer dilinoleyl dimmer dilinoleate, dimmer dilinoleyl diisostearate,dimmer dilinoleyl hydrogenated rosin condensate, dimmer dilinoleic acidhardened castor oil, hydroxyalkyl dimmer dilinoleyl ether, glyceryltriisooctanoate, glyceryl triisostearate, glyceryl trimyristate,glyceryl triisopalmitate, glyceryl trioctanoate, glyceryl trioleate,glyceryl diisostearate, glyceryl tri(caprylate/caprate), glyceryltri(caprylate/caprate/myristate/stearate), hydrogenated rosintriglyceride (hydrogenated ester gum), rosin triglyceride (ester gum),glyceryl behenate eicosane dioate, glyceryl di-2-heptylundecanoate,diglyceryl myristate isostearate, cholesteryl acetate, cholesterylnonanoate, cholesteryl stearate, cholesteryl isostearate, cholesteryloleate, cholesteryl 12-hydroxystearate, cholesteryl ester of macadamianut oil fatty acid, phytosteryl ester of macadamia nut oil fatty acid,phytosteryl isostearate, cholesteryl ester of soft lanolin fatty acid,cholesteryl ester of hard lanolin fatty acid, cholesteryl ester oflong-chain branched fatty acid, cholesteryl ester of long-chainα-hydroxy fatty acid, octyldodecyl ricinoleate, octyldodecyl ester oflanolin fatty acid, octyldodecyl erucate, isostearic acid hardenedcastor oil, ethyl ester of avocado fatty acid, isopropyl ester oflanolin fatty acid, and the like.

In addition thereto, fats and oils, higher alcohols, higher fatty acids,fluorine-based oils and the like may be used in combination of two ormore types thereof. For example, the oil agents described below may alsobe used in combination of two or more types. Hereinafter, the oil agentsother than silicone oils, hydrocarbon oils and fatty acid ester oils,which can be used in the present invention, are described in detail.

As examples of natural animal or vegetable fats and oils andsemi-synthetic fats and oils, mention may be made of avocado oil,linseed oil, almond oil, ibota wax, perilla oil, olive oil, cacaobutter, kapok wax, kaya oil, carnauba wax, liver oil, candelilla wax,beef tallow, neat's-foot oil, beef bone fat, hydrogenated beef tallow,apricot kernel oil, spermaceti wax, hydrogenated oil, wheat germ oil,sesame oil, rice germ oil, rice bran oil, sugar cane wax, sasanqua oil,safflower oil, shear butter, Chinese tung oil, cinnamon oil, jojoba wax,squalane, shellac wax, turtle oil, soybean oil, tea seed oil, camelliaoil, evening primrose oil, corn oil, lard, rapeseed oil, Japanese tungoil, rice bran wax, germ oil, horse fat, persic oil, palm oil, palmkernel oil, castor oil, hydrogenated castor oil, castor oil fatty acidmethyl ester, sunflower oil, grape oil, bayberry wax, jojoba oil,hydrogenated jojoba ester, macadamia nut oil, beeswax, mink oil,cottonseed oil, cotton wax, Japanese wax, Japanese wax kernel oil,montan wax, coconut oil, hydrogenated coconut oil, tri-coconut oil fattyacid glyceride, mutton tallow, peanut oil, lanolin, liquid lanolin,reduced lanolin, lanolin alcohol, hard lanolin, lanolin acetate, lanolinfatty acid isopropyl ester, POE lanolin alcohol ether, POE lanolinalcohol acetate, lanolin fatty acid polyethylene glycol, POEhydrogenated lanolin alcohol ether, egg yolk oil and the like, with theproviso that POE means polyoxyethylene.

As examples of higher alcohols, mention may be made of lauryl alcohol,myristyl alcohol, palmityl alcohol, stearyl alcohol, behenyl alcohol,hexadecyl alcohol, oleyl alcohol, isostearyl alcohol, hexyldodecanol,octyldodecanol, cetostearyl alcohol, 2-decyltetradecinol, cholesterol,sitosterol, phytosterol, lanosterol, POE cholesterol ether, monostearylglycerol ether (batyl alcohol), monooleyl glyceryl ether (selachylalcohol) and the like.

As examples of higher fatty acids, mention may be made of, for example,lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid,undecylenic acid, oleic acid, linolic acid, linolenic acid, arachidonicacid, eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA),isostearic acid, 12-hydroxystearic acid, and the like.

As examples of fluorine-based oils, mention may be made of perfluoropolyether, perfluorodecalin, perfluorooctane and the like.

In the cosmetics of the present invention, one or more surfactantsselected from the group consisting of anionic surfactants, cationicsurfactants, nonionic surfactants, amphoteric surfactants and semi-polarsurfactants can be used together.

Hereinafter, they are described in detail. As examples of anionicsurfactants, mention may be made of saturated or unsaturated fatty acidsalts such as sodium laurate, sodium stearate, sodium oleate, sodiumlinoleate and the like; alkylsulfuric acid salts; alkylbenzenesulfonicacids such as hexylbenzenesulfonic acid, octylbenzenesulfonic acid,dodecylbenzenesulfonic acid and the like, as well as salts thereof;polyoxyalkylene alkyl ether sulfuric acid salts; polyoxyalkylene alkenylether sulfuric acid salts; polyoxyethylene alkylsulfuric ester salts;sulfosuccinic acid alkyl ester salts; polyoxyalkylene sulfosuccinic acidalkyl ester salts; polyoxyalkylene alkylphenyl ether sulfuric acidsalts; alkanesulfonic acid salts; octyltrimethylammonium hydroxide;dodecyltrimethylammonium hydroxide; alkyl sulfonates; polyoxyethylenealkylphenyl ether sulfuric acid salts; polyoxyalkylene alkyl etheracetic acid salts; alkyl phosphoric acid salts; polyoxyalkylene alkylether phosphoric acid salts; acylglutamic acid salts; α-acylsulfonicacid salts; alkylsulfonic acid salts; alkylallylsulfonic acid salts;α-olefinsulfonic acid salts; alkylnaphthalene sulfonic acid salts;alkanesulfonic acid salts; alkyl- or kenylsulfuric acid salts;alkylamidesulfuric acid salts; alkyl- or alkenylphosphoric acid salts;alkylamidephosphoric acid salts; alkyloylalkyl taurine salts;N-acylamino acid salts; sufosuccinic acid salts; alkyl ether carboxylicacid salts; amide ether carboxylic acid salts; α-sulfofatty acid estersalts; alanine derivatives; glycine derivatives; and argininederivatives. As examples of salts, mention may be made of alkali metalsalts such as a sodium salt and the like, alkaline earth metal saltssuch as a magnesium salt and the like, alkanolamine salts such as atriethanolamine salt and the like, and ammonium salts.

As examples of cationic surfactants, mention may be made ofalkyltrimethylammonium chloride, stearyltrimethylammonium chloride,lauryltrimethylammonium chloride, cetyltrimethylammonium chloride, beeftallow alkyltrimethylammonium chloride, behenyltrimethylammoniumchloride, stearyltrimethylammonium bromide, behenyltrimethylammoniumbromide, distearyldimethylammonium chloride, dicocoyldimethylammoniumchloride, dioctyldimethylammonium chloride, di(POE) oleylmethylammonium(2EO) chloride, benzalkonium chloride, alkyl benzalkonium chloride,alkyl dimethylbenzalkonium chloride, benzethonium chloride, stearyldimethylbenzylammonium chloride, lanolin derivative quaternary ammoniumsalt, stearic acid diethylaminoethylamide, stearic aciddimethylaminopropylamide, behenic acid amidepropyldimethylhydroxypropylammonium chloride, stearoyl colaminoformylmethylpyridinium chloride, cetylpyridinium chloride, tall oilalkylbenzyl hydroxyethylimidazolinium chloride, and benzylammonium salt.

As examples of nonionic surfactants, mention may be made ofpolyoxyalkylene ethers, polyoxyalkylene alkyl ethers, polyoxyalkylenefatty acid esters, polyoxyalkylene fatty acid diesters, polyoxyalkyleneresin acid esters, polyoxyalkylene (hardened) castor oils,polyoxyalkylene alkyl phenols, polyoxyalkylene alkyl phenyl ethers,polyoxyalkylene phenyl phenyl ethers, polyoxyalkylene alkyl esters,polyoxyalkylene alkyl esters, sorbitan fatty acid esters,polyoxyalkylene sorbitan alkyl esters, polyoxyalkylene sorbitan fattyacid esters, polyoxyalkylene sorbitol fatty acid esters, polyoxyalkyleneglycerol fatty acid esters, polyglycerol alkyl ethers, polyglycerolfatty acid esters, sucrose fatty acid esters, fatty acid alkanolamides,alkylglucosides, polyoxyalkylene fatty acid bisphenyl ethers,polypropylene glycol, diethylene glycol, polyoxyalkylene-modifiedsilicones, polyglyceryl-modified silicones, glyceryl-modified silicones,sugar-modified silicones, fluorine-based surfactants,polyoxyethylene/polyoxypropylene block polymers, and alkylpolyoxyethylene/polyoxypropylene block polymer ethers.

As examples of amphoteric surfactants, mention may be made ofimidazoline-type, amidobetaine-type, alkylbetaine-type,alkylamidobetaine-type, alkylsulfobetaine-type, amidosulfobetaine-type,hydroxysulfobetaine-type, carbobetaine-type, phosphobetaine-type,aminocarboxylic acid-type, and amidoamino acid-type amphotericsurfactants. More particularly, as examples thereof, mention may be madeof imidazoline-type amphoteric surfactants such as sodium2-undecyl-N,N,N-(hydroxyethylcarboxymethyl)-2-imidazoline,2-cocoyl-2-imidazoliniumhydroxide-1-carboxyethyloxydisodium salt and thelike; alkylbetaine-type amphoteric surfactants such as lauryldimethylaminoacetic acid betaine, myristylbetaine and the like; andamidobetaine-type amphoteric surfactants such as coconut oil fatty acidamidopropyl dimethylamino acetic acid betaine, palm kernel oil fattyacid amidopropyl dimethylamino acetic acid betaine, beef tallow fattyacid amidopropyl dimethylamino acetic acid betaine, hardened beef tallowfatty acid amidopropyl dimethylamino acetic acid betaine, lauricamidopropyl dimethylamino acetic acid betaine, myristicamidopropyldimethylamino acetic acid betaine, palmiticamidopropyldimethylamino acetic acid betaine, stearic amidopropyldimethylamino acetic acid betaine, oleic amidopropyl dimethylaminoacetic acid betaine and the like; alkyl sulfobetaine-type amphotericsurfactants such as coconut oil fatty acid dimethyl sulfopropyl betaineand the like; alkylhydroxy sulfobetaine-type amphoteric surfactants suchas lauryl dimethylaminohydroxy sulfobetaine and the like;phosphobetaine-type amphoteric surfactants such as laurylhydroxyphosphobetaine and the like; amidoamino acid-type amphoteric surfactantssuch as sodium N-lauroyl-N′-hydroxyethyl-N′-carboxymethylethylenediamine, sodium N-oleoyl-N′-hydroxyethyl-N′-carboxymethylethylenediamine, sodium N-cocoyl-N′-hydroxyethyl-N′-carboxymethylethylenediamine, potassium N-lauroyl-N′-hydroxyethyl-N′-carboxymethylethylenediamine, potassium N-oleoyl-N′-hydroxyethyl-N′-carboxymethylethylenediamine, sodium N-lauroyl-N-hydroxyethyl-N′-carboxymethylethylenediamine, sodium N-oleoyl-N-hydroxyethyl-N′-carboxymethylethylenediamine, sodium N-cocoyl-N-hydroxyethyl-N′-carboxymethylethylenediamine, monosodiumN-lauroyl-N-hydroxyethyl-N′,N′-dicarboxymethyl ethylenediamine,monosodium N-oleoyl-N-hydroxyethyl-N′,N′-dicarboxymethylethylenediamine, monosodiumN-cocoyl-N-hydroxyethyl-N′,N′-dicarboxymethyl ethylenediamine, disodiumN-lauroyl-N-hydroxyethyl-N′, N′-dicarboxymethyl ethylenediamine,disodium N-oleoyl-N-hydroxyethyl-N′,N′-dicarboxymethyl ethylenediamine,disodium N-cocoyl-N-hydroxyethyl-N′,N′-dicarboxymethyl ethylenediamineand the like.

As examples of semi-polar surfactants, mention may be made of alkylamineoxide-type surfactants, alkylamine oxides, alkylamide amine oxides,alkylhydroxyamine oxides and the like. Alkyldimethylamine oxides having10 to 18 carbon atoms, alkoxyethyl dihydroxyethylamine oxides having 8to 18 carbon atoms and the like are preferably used. More particularly,as examples thereof, mention may be made of dodecyldimethylamine oxide,dimethyloctylamine oxide, diethyldecylamine oxide, bis-(2-hydroxyethyl)dodecylamine oxide, dipropyltetradecylamine oxide,methylethylhexadecylamine oxide, dodecylamidopropyldimethylamine oxide,cetyldimethylamine oxide, stearyldimethylamine oxide, tallowdimethylamine oxide, dimethyl-2-hydroxyoctadecylamine oxide,lauryldimethylamine oxide, myristyldimethylamine oxide,stearyldimethylamine oxide, isostearyldimethylamine oxide, coconut fattyacid alkyldimethylamine oxide, caprylic amide propyldimethylamine oxide,capric amide propyldimethylamine oxide, lauric amide propyldimethylamineoxide, myristic amide propyldimethylamine oxide, palmitic amidepropyldimethylamine oxide, stearic amide propyldimethylamine oxide,isostearic amide propyldimethylamine oxide, oleic amidepropyldimethylamine oxide, ricinoleic amide propyldimethylamine oxide,12-hydroxystearic amide propyldimethylamine oxide, coconut fatty acidamide propyldimethylamine oxide, palm kernel oil fatty acid amidepropyldimethylamine oxide, castor oil fatty acid amidepropyldimethylamine oxide, lauric amide ethyldimethylamine oxide,myristic amide ethyldimethylamine oxide, coconut fatty acid amideethyldimethylamine oxide, lauric amide ethyldiethylamine oxide, myristicamide ethyldiethylamine oxide, coconut fatty acid amideethyldiethylamine oxide, lauric amide ethyldihydroxyethylamine oxide,myristic amide ethyldihydroxyethylamine oxide, and coconut fatty acidamide ethyldihydroxyethylamine oxide.

The cosmetics of the present invention can contain various cosmetic rawmaterial(s), in addition to the aforementioned components. Theaforementioned raw materials are preferably hydrophobic so that they arenot dissolved in water at all or have a solubility below 1% by weightwith respect to 100 g of water. As examples of the aforementionedcosmetic raw materials, mention may be made of, for example, powders,coloring agents, water-soluble polymers, oil-soluble gelling agents,organo-modified clay minerals, silicone gums, silicone resins, siliconeelastomers, organo-modified silicones, UV-ray protective components andthe like.

As the powders and/or coloring agents, those described above can beused. The powders and/or coloring agents can be at least one type ofpowders selected from inorganic powders, organic powders, and resinpowders, having an average particle size ranging from 1 nm to 20 μm. Atleast one part of the aforementioned powders and/or coloring agents maybe subjected to a water-repellent treatment with a surface-treatmentagent other than that according to the present invention. As examples ofthe water-repellant treatments, mention may be made of organosiloxanetreatments such as a methylhydrogenpolysiloxane treatment, a siliconeresin treatment, a silicone gum treatment, an acryl silicone treatment,a fluorinated silicone treatment and the like; metallic soap treatmentssuch as a zinc stearate treatment and the like; silane treatments suchas a silane coupling agent treatment, an alkylsilane treatment and thelike; fluorine compound treatments such as a perfluoroalkylsilanetreatment, a perfluoroalkyl phosphate treatment, a perfluoro polyethertreatment and the like; amino acid treatments such as anN-lauroyl-L-lysine treatment and the like; oil agent treatments such asa squalane treatment and the like; acryl treatments such as an alkylacrylate treatment and the like. The aforementioned treatments can beused in combination of one or more types thereof.

As the water-soluble polymers, one type or two or more types thereof canbe used. As examples of natural water-soluble polymers, mention may bemade of vegetable-based polymers such as gum Arabic, tragacanth gum,galactan, guar gum, carob gum, Karaya gum, carrageenan, pectin, agar,quince seed, algal colloide, starch (rice, corn, potato, or wheat),glycyrrhizinic acid and the like; microorganism-based polymers such asxanthan gum, dextran, succinoglucan, pullulan, and the like; andanimal-based polymers such as collagen, casein, albumin, gelatin, andthe like. In addition, as examples of semi-synthetic water-solublepolymers, mention may be made of, for example, starch-based polymerssuch as carboxymethyl starch, methyhydroxypropyl starch, and the like;cellulose-based polymers such as methylcellulose, nitrocellulose,ethylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose,sodium cellulose sulfate, hydroxypropylcellulose, sodiumcarboxymethylcellulose (CMC), crystalline cellulose, cellulose powder,and the like; and alginate-based polymers such as sodium alginate,propylene glycol alginate and the like. As examples of syntheticwater-soluble polymers, mention may be made of, for example, vinyl-basedpolymers such as polyvinyl alcohol, polyvinyl methyl ether-basedpolymer, polyvinylpyrrolidone, carboxyvinyl polymer (CARBOPOL 940, 941;manufactured by BF Goodrich Corporation) and the like;polyoxyethylene-based polymers such as polyethylene glycol 20,000,polyethylene glycol 6,000, polyethylene glycol 4,000 and the like;copolymer-based polymers such as a copolymer of polyoxyethylene andpolyoxypropylene, PEG/PPG methyl ether and the like; acryl-basedpolymers such as poly(sodium acrylate), poly(ethyl acrylate),polyacrylamide and the like; polyethylene imines; cationic polymers andthe like.

As examples of other cationic water-soluble polymers, in particular, ascomponents which are preferably blended in hair cosmetics, mention maybe made of quaternary nitrogen-modified polysaccharides such ascation-modified cellulose, cation-modified hydroxyethylcellulose,cation-modified guar gum, cation-modified locust bean gum,cation-modified starch and the like; dimethyldiallylammonium chloridederivatives such as a copolymer of dimethyldiallylammonium chloride andacrylamide, poly(dimethylmethylene piperidinium chloride) and the like;and vinylpyrrolidone derivatives such as a salt of a copolymer ofvinylpyrrolidone and dimethylaminoethyl methacrylic acid, a copolymer ofvinylpyrrolidone and methacrylamide propyltrimethylammonium chloride, acopolymer of vinylpyrrolidone and methylvinylimidazolium chloride andthe like.

As examples of oil-soluble gelling agents, mention may be made ofmetallic soaps such as aluminum stearate, magnesium stearate, zincmyristate and the like; amino acid derivatives such asN-lauroyl-L-glutamic acid, α,γ-di-n-butylamine and the like; dextrinfatty acid esters such as dextrin palmitate, dextrin stearate, dextrin2-ethylhexanoate palmitate and the like; sucrose fatty acid esters suchas sucrose palmitate, sucrose stearate and the like; benzylidenederivatives of sorbitol such as monobenzylidene sorbitol, dibenzylidenesorbitol and the like; and the like. The oil-soluble gelling agents canbe used alone or in combination of two or more types thereof, ifnecessary.

As examples of organo-modified clay minerals, mention may be made of,for example, dimethylbenzyldodecylammonium montmorillonite clay,dimethyldioctadecylammonium montmorillonite clay, dimethylalkylammoniumhectorite, benzyldimethylstearylammonium hectorite,distearyldimethylammonium chloride-treated aluminum magnesium silicateand the like. As examples of commercially available products thereof,mention may be made of Benton 27 (benzyldimethylstearylammoniumchloride-treated hectorite, manufactured by Nationalred Co.), Benton 38(distearyldimethylammonium chloride-treated hectorite, manufactured byNationalred Co.) and the like.

The silicone gum is a linear diorganopolysiloxane having an ultra-highdegree of polymerization, and is also referred to as a silicone rawrubber or an organopolysiloxane gum. The silicone raw rubber possesses ahigh degree of polymerization, and for this reason, it has a measurabledegree of plasticity. In view of this, the silicone raw rubber isdifferent from the aforementioned oil silicones. As examples of theaforementioned silicone raw rubber, mention may be made of substitutedor non-substituted organopolysiloxanes having a dialkylsiloxy unit (Dunit) such as dimethylpolysiloxane, methylphenylpolysiloxane,aminopolysiloxane, methylfluoroalkylpolysiloxane and the like, or thosehaving a micro-crosslinking structure thereof and the like. Asrepresentative examples thereof, there are those represented by thefollowing general formula:

R¹⁰(CH₃)₂SiO{(CH₃)₂SiO}_(s){(CH₃)R¹¹SiO}_(t)Si(CJ₃)₂R¹⁰

wherein R¹¹ is a group selected from a vinyl group, a phenyl group, analkyl group having 6 to 20 carbon atoms, an aminoalkyl group having 3 to15 carbon atoms, a perfluoroalkyl group having 3 to 15 carbon atoms, anda quaternary ammonium salt-containing alkyl group having 3 to 15 carbonatoms; the terminal R¹⁰ is a group selected from an alkyl group having 1to 8 carbon atoms, a phenyl group, a vinyl group, an aminoalkyl grouphaving 3 to 15 carbon atoms, a hydroxyl group and an alkoxy group having1 to 8 carbon atoms; s=2,000 to 6,000; t=0 to 1,000; and s+t=2,000 to6,000.

Among these, a dimethylpolysiloxane raw rubber having a degree ofpolymerization ranging from 3,000 to 20,000 is preferred.

The silicone resin is an organopolysiloxane with a highly branchedmolecular structure, a net-like molecular structure or a cage-likemolecular structure, and may be in the form of a liquid or solid at roomtemperature. Any silicone resins usually used in cosmetics can be usedunless they are contrary to the purposes of the present invention.

As examples of the solid silicone resins, mention may be made of, forexample, MQ resins, MDQ resins, MTQ resins, MDTQ resins, TD resins, TQresins, or TDQ resins comprising any combinations of a triorganosiloxyunit (M unit) (wherein the organo group is a methyl group alone, or amethyl group in combination with a vinyl group or a phenyl group), adiorganosiloxy unit (D unit) (wherein the organo group is a methyl groupalone, or a methyl group in combination with vinyl group or phenylgroup), a monoorganosiloxy unit (T unit) (wherein the organo group is amethyl group, a vinyl group or a phenyl group), and a siloxy unit (Qunit). In addition, as other examples thereof, mention may be made oftrimethylsiloxysilicic acid, polyalkylsiloxysilicic acid,trimethylsiloxysilicic acid containing dimethylsiloxy units andalkyl(perfluoroalkyl) siloxysilicic acid. The aforementioned siliconeresins are preferably oil-soluble, and, in particular, preferably aresoluble in D4 or D5.

A silicone elastomer in any form can be blended in the cosmetic inaccordance with the purpose thereof. In particular, the siliconeelastomer is preferably blended as organopolysiloxane elastomer powdersor a crosslinking organopolysiloxane.

The silicone elastomer powders mainly correspond to a crosslinkedproduct of a linear diorganopolysiloxane, and can be in various formssuch as a spherical form, a flat form, an amorphous form and the like.The elastomer may be in the form of an oil dispersant without shapes. Inthe cosmetic of the present invention, silicone elastomer powders in theform of particles are preferred, which have a primary particle sizeobserved by an electronic microscope and/or an average primary particlesize, measured by a laser diffraction/scattering method, ranging from0.1 to 50 μm, and in which the primary particle is preferably in thespherical form. In addition, the silicone elastomer constituting thesilicone elastomer powder has a hardness preferably not exceeding 80,and more preferably not exceeding 65, when measured by means of a type Adurometer according to JIS K 6253 “Method for determining hardness ofvulcanized rubber or thermoplastic rubber”.

The organopolysiloxane elastomer spherical powders may be optionallysubjected to a surface treatment with a silicone resin, a silica or thelike. As examples of the aforementioned silicone elastomer powders,mention may be made of, for example, those described in JapaneseUnexamined Patent Application, First Publication No. H02-243612;Japanese Unexamined Patent Application, First Publication No. H08-12545;Japanese Unexamined Patent Application, First Publication No. H08-12546;Japanese Unexamined Patent Application, First Publication No. H08-12524;Japanese Unexamined Patent Application, First Publication No.H09-241511; Japanese Unexamined Patent Application, First PublicationNo. H10-36219; Japanese Unexamined Patent Application, First PublicationNo. H11-193331; Japanese Unexamined Patent Application, FirstPublication No. 2000-281523 and the like. The crosslinking siliconepowders listed in “Japanese Cosmetic Ingredients Codex (JCIC)”correspond thereto. As commercially available products oforganopolysiloxane elastomer spherical powders, there are Trefil E-506S,Trefil E-508, 9701 Cosmetic Powder, and 9702 Powder, manufactured by DowCorning Toray Co., Ltd., and the like. The aforementioned siliconeelastomer powders may be subjected to a surface treatment. As examplesof the surface treatment agents, mention may be made ofmethylhydrogenpolysiloxane, silicone resins, metallic soap, silanecoupling agents, silica, inorganic oxides such as titanium oxide and thelike and fluorine compounds such as perfluoroalkylsilane, perfluoroalkylphosphoric ester salts and the like.

In addition, the organopolysiloxane elastomer spherical powders in theform of an aqueous dispersion can also be used in the cosmetic of thepresent invention. As examples of commercially available products of theaforementioned aqueous dispersion, mention may be made of, for example,“BY29-129” and “PF-2001 PIF Emulsion” manufactured by Dow Corning TorayCo., Ltd., and the like. By blending an aqueous dispersion (=suspension)of the aforementioned silicone elastomer powders, the sensation duringuse of the cosmetics of the present invention can be further improved,and from this point of view, the silicone elastomer powders areextremely useful.

As the crosslinking organopolysiloxanes, non-emulsifiableorganopolysiloxanes without hydrophilic parts such as polyoxyalkyleneunits which have a three-dimensional crosslinked structure by a reactionbetween the organopolysiloxane chains and the crosslinking componentsand the like are preferred. The aforementioned crosslinkingorganopolysiloxanes can be used without restrictions of physical modesand preparation methods such as dilution, properties and the like. Asparticularly preferable examples thereof, mention may be made ofα,ω-diene crosslinking silicone elastomers (as commercially availableproducts, DC 9040 Silicone Elastomer Blend, DC 9041 Silicone ElastomerBlend, DC 9045 Silicone Elastomer Blend, and DC 9046 Silicone ElastomerBlend, manufactured by Dow Corning Corporation in the USA) described inU.S. Pat. No. 5,654,362.

The organo-modified silicones are preferably lipophilic. As examplesthereof, mention may be made of amino-modified silicones, aminopolyether-modified silicones, epoxy-modified silicones,carboxyl-modified silicones, amino acid-modified silicones,carbinol-modified silicones, acryl-modified silicones, phenol-modifiedsilicones, amidoalkyl-modified silicones, aminoglycol-modifiedsilicones, and alkoxy-modified silicones. The aforementionedorgano-modified silicones may have an alkylene chain, an aminoalkylenechain or a polyether chain, in addition to the polysiloxane bonds as amain chain, with a degree such that the compound does not exhibithydrophilic properties, and the organo-modified group may exist at theside chain or at one terminal or both terminals of the polysiloxanechain. In the case of using the cosmetics of the present invention ashair cosmetics, amino-modified silicones, carbinol-modified silicones,amino polyether-modified silicones, or amino glycol-modified siliconescan be preferably used. As general examples thereof, amino-modifiedsilicones having a 3-aminopropyl group, anN-(2-aminoethyl)-3-aminopropyl group and the like can be mentioned.

Among UV-ray protective components, there are inorganic UV-rayprotective components and organic UV-ray protective components. If thecosmetics of the present invention are sunscreen cosmetics, at least onetype of inorganic or organic UV-ray protective component, and inparticular, an organic UV-ray protective component is preferablycontained.

The inorganic UV-ray protective components may be components in whichthe aforementioned inorganic powder pigments, metal powder pigments andthe like are blended as UV-ray dispersants. As examples thereof, mentionmay be made of metal oxides such as titanium oxide, zinc oxide, ceriumoxide, titanium suboxide, iron-doped titanium oxides and the like; metalhydroxides such as iron hydroxides and the like; metal flakes such asplaty iron oxide, aluminum flake and the like; and ceramics such assilicon carbide and the like. Among these, at least one type of amaterial selected from fine particulate metal oxides or fine particulatemetal hydroxides with an average particle size ranging from 1 to 100 nmin the form of granules, plates, needles, or fibers is, in particular,preferred. The aforementioned powders are preferably subjected toconventional surface treatments such as fluorine compound treatments,among which a perfluoroalkyl phosphate treatment, a perfluoroalkylsilanetreatment, a perfluoropolyether treatment, a fluorosilicone treatment,and a fluorinated silicone resin treatment are preferred; siliconetreatments, among which a methylhydrogenpolysiloxane treatment, adimethylpolysiloxane treatment, and a vapor-phasetetramethyltetrahydrogencyclotetrasiloxane treatment are preferred;silicone resin treatments, among which a trimethylsiloxysilicic acidtreatment is preferred; pendant treatments which are methods of addingalkyl chains after the vapor-phase silicone treatment; silane couplingagent treatments; titanium coupling agent treatments; silane treatmentsamong which an alkylsilane treatment and an alkylsilazane treatment arepreferred; oil agent treatments; N-acylated lysine treatments;polyacrylic acid treatments; metallic soap treatments in which a stearicacid salt or a myristic acid salt is preferably used; acrylic resintreatments; metal oxide treatments and the like. A plurality of thetreatments described above are preferably carried out. For example, thesurface of the fine particulate titanium oxide is coated with a metaloxide such as silicon oxide, alumina or the like, and then, a surfacetreatment with an alkylsilane is carried out. The total amount of thematerial used for the surface treatment preferably ranges from 0.1 to50% by weight based on the amount of the powder.

The organic UV-ray protective components are lipophilic UV-rayprotective components. As examples thereof, mention may be made ofbenzoic acid-based UV-ray absorbers such as paraminobenzoic acid(hereinafter, referred to as PABA), PABA monoglycerol ester,N,N-dipropoxy-PABA ethyl ester, N,N-diethoxy-PABA ethyl ester,N,N-dimethyl-PABA ethyl ester, N,N-dimethyl-PABA butyl ester and thelike; anthranilic acid-based UV-ray absorbers such as homomethylN-acetylanthranilate and the like; salicylic acid-based UV-ray absorberssuch as amyl salicylate, menthyl salicylate, homomethyl salicylate,octyl salicylate, phenyl salicylate, benzyl salicylate,p-isopropanolphenyl salicylate and the like; cinnamic acid-based UV-rayabsorbers such as octyl cinnamate, ethyl 4-isopropylcinnamate, methyl2,5-diisopropylcinnamate, ethyl 2,4-diisopropylcinnamate, methyl2,4-diisopropylcinnamate, propyl p-methoxycinnamate, isopropylp-methoxycinnamate, isoamyl p-methoxycinnamate, octyl p-methoxycinnamate(2-ethylhexyl p-methoxycinnamate), 2-ethoxyethyl p-methoxycinnamate,cyclohexyl p-methoxycinnamate, ethyl α-cyano-β-phenylcinnamate,2-ethylhexyl α-cyano-β-phenylcinnamate, glycerylmono-2-ethylhexanoyl-diparamethoxycinnamate, 3-methyl4-[methylbis(trimethylsiloxy)silyl]butyl 3,4,5-trimethoxycinnamate andthe like; benzophenone-based UV-ray absorbers such as2,4-dihydroxybenzophenone, 2,2′-dihydroxy-4-methoxybenzophenone,2,2′-dihydroxy-4,4′-dimethoxybenzophenone,2,2′,4,4′-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone,2-hydroxy-4-methoxy-4′-methylbenzophenone,2-hydroxy-4-methoxybenzophenone 5-sulfonate, 4-phenylbenzophenone,2-ethylhexyl-4′-phenylbenzophenone 2-carboxylate,hydroxy-4-n-octoxybenzophenone, 4-hydroxy-3-carboxybenzophenone and thelike; 3-(4′-methylbenzylidene)-d,l-camphor; 3-benzylidene-d,l-camphor;urocanic acid; ethyl urocanate; 2-phenyl-5-methylbenzoxazole;2,2′-hydroxy-5-methylphenyl benzotriazole;2-(2′-hydroxy-5′-t-octylphenyl)benzotriazole;2-(2′-hydroxy-5′-methylphenyl)benzotriazole; dibenzaladine;dianisoylmethane; 4-methoxy-4′-t-butylbenzoylmethane;5-(3,3-dimethyl-2-norbonylidene)-3-pentan-2-one and the like.

Furthermore, hydrophobic polymer powders containing the aforementionedorganic UV-ray protective components inside thereof can also be used.The polymer powder may be hollow or not, may have an average primaryparticle size thereof ranging from 0.1 to 50 μm and may have a particlesize distribution thereof of either broad or sharp. As examples of thepolymers, mention may be made of acrylic resins, methacrylic resins,styrene resins, polyurethane resins, polyethylene, polypropylene,polyethylene terephthalate, silicone resins, nylons, acrylamide resins,and silylated polypeptide resins. Polymer powders containing the organicUV-ray protective components in an amount ranging from 0.1 to 30% byweight with respect to the amount of the powder are preferred. Polymerpowders containing 4-tert-butyl-4′-methoxydibenzoylmethane, which is aUV-A absorber, are particularly preferred.

The UV-ray protective components which can be preferably used in thecosmetics of the present invention are at least one type of compoundselected from the group consisting of fine particulate titanium oxide,fine particulate zinc oxide, 2-ethylhexyl paramethoxycinnamate,4-tert-butyl-4′-methoxydibenzoylmethane, and benzophenone-based UV-rayabsorbers. The aforementioned UV-ray protective components are commonlyused and easily available, and exhibit superior effects of preventingultraviolet rays. For these reasons, the aforementioned UV-rayprotective components are preferably used. In particular, inorganicUV-ray protective components and organic UV-ray protective componentsare preferably used in combination. In addition, UV-A protectivecomponents and UV-B protective components are further preferably used incombination.

In the cosmetics of the present invention, other components usually usedin cosmetics can be blended within a range which does not impair theeffects of the present invention, such as alcohols, organic resins,humectants, preservatives, anti-microbial agents, perfumes, salts,antioxidants, pH adjustors, chelating agents, algefacient agents,anti-inflammatory agents, components for beautifying the skin (such aswhitening agents, cell activators, agents for ameliorating skinroughness, blood circulation accelerators, astringents, antiseborrheicagents and the like), vitamins, amino acids, nucleic acids, hormones,clathrate compounds and the like. They are not particularly restrictedthereto.

As the alcohols, one type or two or more types of polyhydric alcoholsand/or lower monovalent alcohols can be used. As examples of loweralcohols, mention may be made of ethanol, isopropanol, n-propanol,t-butanol, s-butanol and the like. As examples of polyhydric alcohols,mention may be made of divalent alcohols such as 1,3-butylene glycol,1,2-butylene glycol, propylene glycol, trimethylene glycol,tetramethylene glycol, 2,3-butylene glycol, pentamethylene glycol,2-butene-1,4-diol, dibutylene glycol, pentyl glycol, hexylene glycol,octylene glycol and the like; trivalent alcohols such as glycerol,trimethylolpropane, 1,2,6-hexanetriol and the like; polyhydric alcoholshaving tetra- or more valences such as pentaerythritol, xylitol and thelike; sugar alcohols such as sorbitol, mannitol, maltitol, maltotriose,sucrose, erytritol, glucose, fructose, starch decomposed products,maltose, xylitose, starch decomposed reduction alcohols and the like. Inaddition to the aforementioned polyhydric alcohols having a lowmolecular weight, mention may be made of polyhydric alcohol polymerssuch as diethylene glycol, dipropylene glycol, triethylene glycol,polypropylene glycol, tetraethylene glycol, diglycerol, polyethyleneglycol, triglycerol, tetraglycerol, polyglycerol and the like. Amongthese, 1,3-butylene glycol, sorbitol, dipropylene glycol, glycerol, andpolyethylene glycol are, in particular, preferred. The blending amountthereof preferably ranges from 0.1 to 50% by weight with respect to thetotal amount of the cosmetic.

As examples of organic resins, mention may be made of polyvinyl alcohol,polyvinylpyrrolidone, poly(alkyl acrylate) copolymer and the like.

As examples of humectants, mention may be made of, for example,hyaluronic acid, chondroitin sulfate, pyrrolidone carboxylic acid salts,polyoxyethylene methylglucoside, polyoxypropylene methylglucoside, andthe like. Needless to say, the aforementioned polyhydric alcoholsexhibit a function of retaining moisture on the skin or hair.

As examples of the preservatives, mention may be made of, for example,alkyl paraoxybenzoates, benzoic acid, sodium benzoate, sorbic acid,potassium sorbate, phenoxyethanol and the like. As examples of theantimicrobial agents, mention may be made of benzoic acid, salicylicacid, carbolic acid, sorbic acid, alkyl paraoxybenzoates,parachloromethacresol, hexachlorophene, benzalkonium chloride,chlorhexidine chloride, trichlorocarbanilide, trichlosan,photosensitizers and the like. In the case of lipsticks, theaforementioned compounds are not preferably contained.

As examples of perfumes, mention may be made of perfumes extracted fromflowers, seeds, leaves, and roots of various plants; perfumes extractedfrom seaweeds; perfumes extracted from various parts or secretion glandsof animals such as musk and sperm oil; or artificially synthesizedperfumes such as menthol, musk, ethyl acetate, and vanilla. The perfumesare blended in the cosmetics in order to impart the cosmetics with acertain aroma or scent, or in order to mask unpleasant odor.

As examples of antioxidants, mention may be made of, for example,tocopherol, butylhydroxyanisole, dibutylhydroxytoluene, phytic acid andthe like.

As examples of pH adjustors, mention may be made of, for example, lacticacid, citric acid, glycolic acid, succinic acid, tartaric acid, dl-malicacid, potassium carbonate, sodium hydrogencarbonate, ammoniumhydrogencarbonate and the like.

As examples of chelating agents, mention may be made of, for example,alanine, sodium salt of edetic acid, sodium polyphosphate, sodiummetaphosphate, phosphoric acid and the like.

As examples of algefacient agents, mention may be made of l-menthol,camphor and the like.

As examples of anti-inflammatory agents, mention may be made ofε-aminocaproic acid, glycyrrhizinic acid, β-glycyrrhetinic acid,lysozyme chloride, guaiazulene, hydrocortisone, allantoin, tranexamicacid, azulene and the like

As examples of skin-beautifying components, mention may be made ofwhitening agents such as placenta extracts, arbutin, glutathione,saxifrageous extracts and the like; cell activators such as royal jelly,and the like; agents for ameliorating skin roughness; blood circulationaccelerators such as nonylic acid vanillylamide, benzyl nicotinate,beta-butoxyethyl nicotinate, capsaicin, gingerone, cantharide tincture,ichthammol, caffeine, tannic acid, alpha-borneol, tocopherol nicotinate,inositol hexanicotinate, cyclandelate, cinnarizine, tolazoline,acetylcholine, verapamil, cepharanthine, gamma-orizanol and the like;astringents such as zinc oxide, tannic acid and the like; antiseborrheicagents such as sulfur, thianthol and the like; and the like.

As examples of vitamins, mention may be made of vitamin As such asvitamin A oil, retinol, retinol acetate, retinol palmitate and the like;vitamin Bs such as vitamin B2s such as riboflavin, riboflavin butyrate,flavin adenine dinucleotide and the like; vitamin B6s such as pyridoxinehydrochloride, pyridoxine dioctanoate, pyridoxine tripalmitate and thelike; vitamin B12 and derivatives thereof; vitamin B15 and derivativesthereof, and the like; vitamin Cs such as L-ascorbic acid, L-ascorbyldipalmitic acid esters, sodium L-ascorbyl 2-sulfate, dipotassiumL-ascorbyl phosphoric acid diester and the like; vitamin Ds such asergocalciferol, cholecalciferol and the like; vitamin Es such asalpha-tocopherol, beta-tocopherol, gamma-tocopherol, dl-alpha-tocopherolacetate, dl-alpha-tocopherol nicotinate, dl-alpha-tocopherol succinateand the like; vitamin H; vitamin P; nicotinic acids such as nicotinicacid, benzyl nicotinate and the like; pantothenic acids such as calciumpantothenate, D-pantothenyl alcohol, pantothenyl ethyl ether, acetylpantothenyl ethyl ether and the like; and the like.

As examples of amino acids, mention may be made of glycine, valine,leucine, isoleucine, serine, threonine, phenylalanine, arginine, lysine,aspartic acid, glutamate, cystine, cysteine, methionine, tryptophan andthe like.

As examples of nucleic acids, mention may be made of deoxyribonucleicacid and the like.

As examples of hormones, mention may be made of estradiol, ethenylestradiol and the like.

In the cosmetics of the present invention, natural vegetable extractcomponents, seaweed extract components and herbal medicine componentscan be blended in accordance with the purposes thereof. Theaforementioned components can be blended in combination of two or moretypes thereof.

As detailed examples thereof, mention may be made of, for example,Angelica keiskei extract, avocado extract, Hydrangea serrata extract,Althaea officinalis extract, Arnica montana extract, aloe extract,apricot extract, apricot kernel extract, Gingko biloba extract, fennelfruit extract, turmeric root extract, oolong tea extract, Rosamultiflora extract, Echinacea angustifolia leaf extract, Scutellariabaicalensis root Extract, Phellodendron amurense bark extract, Coptisrhizome extract, Hordeum vulgare seed extract, Hypericum perforatumextract, Lamium album extract, Nasturtium officinale extract, orangeextract, dried sea water solution, seaweed extract, hydrolyzed elastin,hydrolyzed wheat powders, hydrolyzed silk, Chamomilla recutita extract,carrot extract, Artemisia capillaris flower extract, Glycyrrhiza glabraextract, Hibiscus sabdariffa extract, Pyracantha fortuneana extract,kiwi extract, Cinchona succirubra extract, cucumber extract, guanosine,Gardenia florida extact, Sasa veitchii extract, Sophora angustifoliaextract, walnut extract, grapefruit extract, Clematis vitalba leafextract, chlorella extract, Morus alba extract, Gentiana lutea extract,black tea extract, yeast extract, burdock extract, fermented rice branextract, rice germ oil, Symphytum officinale leaf extract, collagen,Vaccinum vitis idaea extract, Asiasarum sieboldi extract, Bupleurumfalcatum extract, umbilical extract, Salvia extract, Crocus sativusflower extract, sasa bamboo grass extract, Crataegus cuneata fruitextract, Zanthoxylum piperitum extract, Corthellus shiitake extract,Rehmannia chinensis root extract, Lithospermum erythrorhizone rootextract, Perilla ocymoides extract, Tilia cordata extract, Spiraeaulmaria extract, Paeonia albiflora extract, Acorns calamus root extract,Betula alba extract, Equisetum arvense extract, Hedera helix extract,Crataegus oxyacantha extract, Sambucus nigra extract,Achilleamillefolium extract, Mentha piperita leaf extract, sage extract,Malva sylvestris extract, Cnidium officinale root extract, Swertiajaponica extract, soybean seed extract, Zizyphus jujuba fruit extract,thyme extract, Camellia sinensis leaf extract, Eugenia caryophyllusflower extract, Imperata cylindrica extract, Citrus unshiu peel extract,Angelica acutiloba root extract, Calendula officinalis extract, Prunuspersica kernel extract, Citrus aurantium peel extract, Houttuyniacordata extract, tomato extract, natto extract, carrot extract, garlicextract, Rosa canina fruit extract, hibiscus extract, Ophiopogonjaponicus root extract, Nelumbo nucifera extract, parsley extract,honey, Hamamelis virginiana extract, Parietaria officinalis extract,Isodon trichocarpus extract, bisabolol, Eriobotrya japonica extract,Tussilago farfara flower extract, Petasites japonicus extract, Poriacocos extract, Ruscus aculeatus root extract, grape extract, propolis,Luffa cylindrica fruit extract, safflower flower extract, peppermintextract, Tillia miquellana extract, Paeonia suffruticosa root extract,Humulus lupulus extract, Pinus sylvestris cone extract, horse chestnutextract, Lysichiton camtschatcense extract, Sapindus mukurossi peelextract, Melissa officinalis leaf extract, peach extract, Centaureacyanus flower extract, Eucalyptus globulus leaf extract, Saxifragasarementosa extract, Citrus junos extract, Coix lacryma-jobi seedextract, Artemisia princeps extract, lavender extract, apple extract,lettuce extract, lemon extract, Astragalus sinicus extract, roseextract, rosemary extract, Roman chamomile extract, and royal jellyextract. Those which are lipophilic are particularly preferred.

In the cosmetics of the present invention, depending on the purposesthereof, solvents such as light isoparaffins, ethers, LPG,N-methylpyrrolidone, next-generation chlorofluorocarbons, and the like,can be blended in addition to water such as purified water, mineralwater and the like.

In addition, in the cosmetic of the present invention, at least onematerial selected from the group consisting of acrylsilicone dendrimercopolymers, polyamide-modified silicones, alkyl-modified silicone waxesand alkyl-modified silicone resin waxes can be used, in addition to thecopolymer of the present invention.

As particularly preferable examples of the acrylsilicone dendrimercopolymers, mention may be made of, for example, a vinyl-based polymerhaving a carbosiloxane dendrimer structure at the side chain, which isdescribed in Japanese Patent No. 4009382 (Japanese Unexamined PatentApplication, First Publication No. 2000-063225). As examples ofcommercially available products, mention may be made of FA 4001 CMSilicone Acrylate, and FA 4002 ID Silicone Acrylate (manufactured by DowCorning Toray Co., Ltd.) and the like.

As examples of the polyamide-modified silicones, mention may be made of,for example, siloxane-based polyamides described in U.S. Pat. No.5,981,680. As examples of commercially available products, mention maybe made of 2-8178 Gellant, and 2-8179 Gellant (manufactured by DowCorning Corporation, in the USA) and the like.

As examples of the alkyl-modified silicone waxes which may be analkyl-modified silicone in the form of a wax at room temperature,mention may be made of, for example, a methyl(long-chainalkyl)polysiloxane of which both molecular terminals are capped withtrimethylsiloxy groups, a copolymer of a methyl(long-chainalkyl)siloxane and a dimethylpolysiloxane of which both molecularterminals are capped with trimethylsiloxy groups, a both-terminal(long-chain alkyl)-modified dimethylpolysiloxane and the like. Asexamples of the commercially available products thereof, mention may bemade of AMS-C30 Cosmetic Wax, and 2503 Cosmetic Wax (manufactured by DowCorning Corporation, in the USA) and the like.

As preferable examples of the alkyl-modified silicone resin waxes,mention may be made of, for example, silsesquioxane resin waxesdescribed in Published Japanese Translation No. 2007-532754 of the PCTInternational Application.

The cosmetics of the present invention can be in the form of liquids,milky lotions, creams, solids, pastes, gels, powders, lamellas, mousses,sprays and the like. As examples of the cosmetics of the presentinvention, mention may be made of, for example, UV-ray protectiveproducts such as sunscreen agents and the like; skin care products suchas cosmetic lotions, cosmetic milks, creams, cleansing products,products for use in massaging, cleansing agents and the like; makeupproducts such as foundations, makeup bases, cheek colors, eye shadows,mascaras, eyeliners, lipsticks and the like; products for use on hairsuch as shampoos, rinses, treatments and the like; antiperspirantproducts; deodorant products and the like.

EXAMPLES

Hereinafter, the present invention is described in detail with referenceto examples and comparative examples. It should be understood that thepresent invention is not restricted to the examples. In the followingdescription, “%” and “parts” mean “% by weight” and “parts by weight”,respectively.

Synthesis Example 1

100 g of toluene was placed in a four-necked flask with a volume of 300mL, equipped with a stirrer, a thermometer and a reflux condenser, andbubbling with nitrogen gas was carried out to sufficiently deaerate,followed by heating to 100° C. 36 g of methyl methacrylate, 14 g ofn-butyl acrylate, 40 g of a carbosiloxane dendrimer monomer representedby the following formula (A):

10 g of methacryloxypropyltriethoxysilane, and 1.0 g of2,2′-azobis-2-methylbutyronitrile (manufactured by Otsuka PharmaceuticalCo., Ltd.) were placed in a dropping funnel, and they were dissolved.The monomer mixture was added dropwise to the flask which was maintainedat 100° C. from the dropping funnel over 2 hours under a nitrogenatmosphere. After completion of the dropwise addition, the mixture washeated and stirred for 6 hours under a nitrogen atmosphere. The reactionproduct after stirring was subjected to analysis of the polymerizationaddition rate by means of gas chromatography. As a result, the additionrate of polymerization was 97%, and it was confirmed that a vinyl-basedpolymer was obtained. Toluene was added to the aforementionedvinyl-based polymer so as to adjust the solid content to 40%. The weightaverage molecular weight thereof on the basis of polystyrene standard bymeans of GPC was 30,000.

Synthesis Example 2

100 g of toluene was placed in a four-necked flask with a volume of 300mL, equipped with a stirrer, a thermometer and a reflux condenser, andbubbling with nitrogen gas was carried out to sufficiently deaerate,followed by heating to 100° C. 31 g of methyl methacrylate, 40 g of thecarbosiloxane dendrimer monomer represented by the aforementionedformula (A), 24 g of 2-ethylhexyl acrylate, 5 g ofmethacryloxypropyltriethoxysilane, and 1.0 g of2,2′-azobis-2-methylbutyronitrile (manufactured by Otsuka PharmaceuticalCo., Ltd.) were placed in a dropping funnel, and they were dissolved.The monomer mixture was added dropwise to the flask which was maintainedat 100° C. from the dropping funnel over 2 hours under a nitrogenatmosphere. After completion of the dropwise addition, the mixture washeated and stirred for 6 hours under a nitrogen atmosphere. The reactionproduct after stirring was subjected to analysis of the polymerizationaddition rate by means of gas chromatography. As a result, the additionrate of polymerization was 97%, and it was confirmed that a vinyl-basedpolymer was obtained. Toluene was added to the aforementionedvinyl-based polymer so as to adjust the solid content to 40%. The weightaverage molecular weight thereof on the basis of polystyrene standard bymeans of GPC was 26,000.

Synthesis Example 3

100 g of toluene was placed in a four-necked flask with a volume of 300mL, equipped with a stirrer, a thermometer and a reflux condenser, andbubbling with nitrogen gas was carried out to sufficiently deaerate,followed by heating to 100° C. 20 g of methyl methacrylate, 30 g ofstearyl methacrylate, 5 g of n-butyl acrylate, 40 g of the carbosiloxanedendrimer monomer represented by the aforementioned formula (A), 5 g ofmethacryloxypropyltriethoxysilane, and 1.0 g of2,2′-azobis-2-methylbutyronitrile (manufactured by Otsuka PharmaceuticalCo., Ltd.) were placed in a dropping funnel, and they were dissolved.The monomer mixture was added dropwise to the flask which was maintainedat 100° C. from the dropping funnel over 2 hours under a nitrogenatmosphere. After completion of the dropwise addition, the mixture washeated and stirred for 6 hours under a nitrogen atmosphere. The reactionproduct after stirring was subjected to analysis of the polymerizationaddition rate by means of gas chromatography. As a result, the additionrate of polymerization was 97%, and it was confirmed that a vinyl-basedpolymer was obtained. Toluene was added to the aforementionedvinyl-based polymer so as to adjust the solid content to 40%. The weightaverage molecular weight thereof on the basis of polystyrene standard bymeans of GPC was 26,000.

Synthesis Example 4

100 g of toluene was placed in a four-necked flask with a volume of 300mL, equipped with a stirrer, a thermometer and a reflux condenser, andbubbling with nitrogen gas was carried out to sufficiently deaerate,followed by heating to 100° C. 15 g of methyl methacrylate, 30 g oftrifluoroethyl methacrylate, 10 g of n-butyl acrylate, 40 g of thecarbosiloxane dendrimer monomer represented by the aforementionedformula (A), 5 g of methacryloxypropyltriethoxysilane, and 1.0 g of2,2′-azobis-2-methylbutyronitrile (manufactured by Otsuka PharmaceuticalCo., Ltd.) were placed in a dropping funnel, and they were dissolved.The monomer mixture was added dropwise to the flask which was maintainedat 100° C. from the dropping funnel over 2 hours under a nitrogenatmosphere. After completion of the dropwise addition, the mixture washeated and stirred for 6 hours under a nitrogen atmosphere. The reactionproduct after stirring was subjected to analysis of the polymerizationaddition rate by means of gas chromatography. As a result, the additionrate of polymerization was 97%, and it was confirmed that a vinyl-basedpolymer was obtained. Toluene was added to the aforementionedvinyl-based polymer so as to adjust the solid content to 40%. The weightaverage molecular weight thereof on the basis of polystyrene standard bymeans of GPC was 22,000.

Synthesis Example 5

100 g of toluene was placed in a four-necked flask with a volume of 300mL, equipped with a stirrer, a thermometer and a reflux condenser, andbubbling with nitrogen gas was carried out to sufficiently deaerate,followed by heating to 100° C. 38 g of methyl methacrylate, 12 g ofn-butyl acrylate, 40 g of the carbosiloxane dendrimer monomerrepresented by the aforementioned formula (A), 10 g ofmethacryloxypropyltriethoxysilane, and 1.0 g of2,2′-azobis-2-methylbutyronitrile (manufactured by Otsuka PharmaceuticalCo., Ltd.) were placed in a dropping funnel, and they were dissolved.The monomer mixture was added dropwise to the flask which was maintainedat 100° C. from the dropping funnel over 2 hours under a nitrogenatmosphere. After completion of the dropwise addition, the mixture washeated and stirred for 6 hours under a nitrogen atmosphere. The reactionproduct after stirring was subjected to analysis of the polymerizationaddition rate by means of gas chromatography. As a result, the additionrate of polymerization was 97%, and it was confirmed that a vinyl-basedpolymer was obtained. Toluene was added to the aforementionedvinyl-based polymer so as to adjust the solid content to 40%. The weightaverage molecular weight thereof on the basis of polystyrene standard bymeans of GPC was 35,000.

Synthesis Example 6

100 g of toluene was placed in a four-necked flask with a volume of 300mL, equipped with a stirrer, a thermometer and a reflux condenser, andbubbling with nitrogen gas was carried out to sufficiently deaerate,followed by heating to 100° C. 31 g of methyl methacrylate, 9 g ofn-butyl acrylate, 50 g of the carbosiloxane dendrimer monomerrepresented by the aforementioned formula (A), 10 g ofmethacryloxypropyltrimethoxysilane, and 1.0 g of2,2′-azobis-2-methylbutyronitrile (manufactured by Otsuka PharmaceuticalCo., Ltd.) were placed in a dropping funnel, and they were dissolved.The monomer mixture was added dropwise to the flask which was maintainedat 100° C. from the dropping funnel over 2 hours under a nitrogenatmosphere. After completion of the dropwise addition, the mixture washeated and stirred for 6 hours under a nitrogen atmosphere. The reactionproduct after stirring was subjected to analysis of the polymerizationaddition rate by means of gas chromatography. As a result, the additionrate of polymerization was 97%, and it was confirmed that a vinyl-basedpolymer was obtained. Toluene was added to the aforementionedvinyl-based polymer so as to adjust the solid content to 40%. The weightaverage molecular weight thereof on the basis of polystyrene standard bymeans of GPC was 20,000.

Synthesis Example 7

100 g of toluene was placed in a four-necked flask with a volume of 300mL, equipped with a stirrer, a thermometer and a reflux condenser, andbubbling with nitrogen gas was carried out to sufficiently deaerate,followed by heating to 100° C. 50 g of methyl methacrylate, 10 g ofn-butyl acrylate, 40 g of the carbosiloxane dendrimer monomerrepresented by the aforementioned formula (A), and 1.0 g of2,2′-azobis-2-methylbutyronitrile (manufactured by Otsuka PharmaceuticalCo., Ltd.) were placed in a dropping funnel, and they were dissolved.The monomer mixture was added dropwise to the flask which was maintainedat 100° C. from the dropping funnel over 2 hours under a nitrogenatmosphere. After completion of the dropwise addition, the mixture washeated and stirred for 6 hours under a nitrogen atmosphere. The reactionproduct after stirring was subjected to analysis of the polymerizationaddition rate by means of gas chromatography. As a result, the additionrate of polymerization was 97%, and it was confirmed that a vinyl-basedpolymer was obtained. Toluene was added to the aforementionedvinyl-based polymer so as to adjust the solid content to 40%. The weightaverage molecular weight thereof on the basis of polystyrene standard bymeans of GPC was 45,000.

Synthesis Example 8

100 g of toluene was placed in a four-necked flask with a volume of 300mL, equipped with a stirrer, a thermometer and a reflux condenser, andbubbling with nitrogen gas was carried out to sufficiently deaerate,followed by heating to 100° C. 27 g of methyl methacrylate, 8 g ofn-butyl acrylate, 45 g of the carbosiloxane dendrimer monomerrepresented by the aforementioned formula (A), 20 g of stearylmethacrylate, and 1.0 g of 2,2′-azobis-2-methylbutyronitrile(manufactured by Otsuka Pharmaceutical Co., Ltd.) were placed in adropping funnel, and they were dissolved. The monomer mixture was addeddropwise to the flask which was maintained at 100° C. from the droppingfunnel over 2 hours under a nitrogen atmosphere. After completion of thedropwise addition, the mixture was heated and stirred for 6 hours undera nitrogen atmosphere. The reaction product after stirring was subjectedto analysis of the polymerization addition rate by means of gaschromatography. As a result, the addition rate of polymerization was97%, and it was confirmed that a vinyl-based polymer was obtained.Toluene was added to the aforementioned vinyl-based polymer so as toadjust the solid content to 40%. The weight average molecular weightthereof on the basis of polystyrene standard by, means of GPC was19,000.

Comparative Synthesis Example 1

100 g of toluene was placed in a four-necked flask with a volume of 500mL, equipped with a stirrer, a thermometer and a reflux condenser, andbubbling with nitrogen gas was carried out to sufficiently deaerate,followed by heating to 100° C. 41 g of methyl methacrylate, 14 g ofn-butyl acrylate, 40 g of a methacryl-modified silicone monomer(pentacosamer) represented by the following formula:

5 g of methacryloxypropyltrimethoxysilane, and 1.0 g of2,2′-azobis-2-methylbutyronitrile (manufactured by Otsuka PharmaceuticalCo., Ltd.) were placed in a dropping funnel, and they were dissolved.The monomer mixture was added dropwise to the flask which was maintainedat 80° C. from the dropping funnel over 2 hours under a nitrogenatmosphere. After completion of the dropwise addition, the mixture washeated and stirred for 6 hours under a nitrogen atmosphere. The reactionproduct after stirring was subjected to analysis of the polymerizationaddition rate by means of gas chromatography. As a result, the additionrate of polymerization was 98%, and it was confirmed that a vinyl-basedpolymer was obtained. Toluene was added to the aforementionedvinyl-based polymer so as to adjust the solid content to 40%. The weightaverage molecular weight thereof on the basis of polystyrene standard bymeans of GPC was 42,000.

Examples 1 to 8 and Comparative Examples 1 and 2

A solution obtained by mixing 1.25 g of a 40% solution of thesurface-treatment agent produced in Synthesis Example 1 and 5 g oftoluene was added to 25 g of untreated titanium oxide (CR-50,manufactured by Ishihara Sangyo Kaisha Ltd.) which had beenpre-pulverized by means of a pulverizer, and the mixture was stirred.After stirring, the toluene was removed by drying in an oven at 150° C.,and the mixture was subjected to a baking treatment. Subsequently, thebaked product was pulverized by means of a pulverizer. Thereby, treatedpowders of Example 1, which were treated with 2% of the carbosiloxanedendrimer, were obtained.

In the same manner as described above, surface-treated powders (2%) inaccordance with Examples 2 to 8 and Comparative Example 1 were obtainedby using Synthesis Examples 2 to 8 and Comparative Synthesis Example 1,respectively. In addition, as Comparative Example 2, comparativesurface-treated powders were obtained by subjecting the same type ofuntreated titanium oxide as described above to a surface treatment with2% of methylhydrogenpolysiloxane.

Evaluation 1

Properties of water resistance, the stability over time andhydrogen-generating properties of the surface-treated powders accordingto Examples 1 to 8 and Comparative Examples 1 and 2 were evaluated asdescribed below. The results are shown in Table 1.

Water Resistance

A specified amount of the surface-treated powders was pressed, and awater droplet was mounted on the surface thereof. The contact angle withrespect to water droplet was measured by means of a contact angle meter.As the measurement apparatus, an automatic contact angle meter(manufactured by Kyowa Interface Science Co., Ltd.) was used.

Stability Over Time

A mixture of 10 g of ethanol and 40 g of ion-exchanged water was placedin a glass bottle, and 0.5 g of the surface-treated powder was addedthereto. The bottle was allowed to stand in an oven at 50° C. Whether ornot the surface-treated powders settled out was evaluated by visualconfirmation. The composition in which no sedimentation was observed forone or more months at 50° C. was evaluated as ◯◯, the composition inwhich sedimentation was partially observed for one month at 50° C. wasevaluated as ◯, and the composition in which complete sedimentation wasobserved for one month at 50° C. was evaluated as Δ.

Hydrogen-Generating Properties

A solution composed of potassium hydroxide, water and ethanol was addedto a dispersion in which the surface-treated powders were dispersed indecamethylpentacyclosiloxane (D5), and whether or not hydrogen generatedwas confirmed. The composition in which no hydrogen generated wasevaluated as ◯◯ and the composition in which hydrogen generated wasevaluated as X.

TABLE 1 Ex. Ex. Ex. Ex. Ex. Ex. Ex. Ex. Comp. Comp. 1 2 3 4 5 6 7 8 Ex.1 Ex. 2 Contact 151 146 142 152 149 147 142 140 137 145 angle of waterStability ◯◯ ◯ ◯ ◯ ◯◯ ◯◯ Δ ◯ ◯ ◯◯ over time Hydrogen ◯◯ ◯◯ ◯◯ ◯◯ ◯◯ ◯◯◯◯ ◯◯ ◯◯ X generating properties

As shown in Table 1, it can be seen that the surface-treated powdersaccording to Examples 1 to 8 exhibit superior water resistance andsuperior stability over time, as compared with the surface-treatedpowders according to Comparative Examples 1 and 2, and generate nohydrogen over time. Therefore, it is confirmed that the surface-treatedpowders of the present invention are extremely superior as raw materialsfor use in cosmetics.

Evaluation 2

A solution obtained by mixing 2 g of the 40% solution of the surfacetreatment agent produced in each of Synthesis Examples 3 and 6 andComparative Synthesis Example 1 and 30 g of toluene was added to 40 g ofuntreated titanium oxide fine powder (MT-500B, manufactured by TaycaCorporation), and the mixture was stirred. Subsequently, toluene wasremoved by drying in an oven at 150° C., and a baking treatment wascarried out thereon. Subsequently, 37 g of decamethylpentacyclosiloxane(D5), 30 g of the dried powders, 300 g of zirconia beads and 7.1 g ofpolyether-modified silicone (SS2910, manufactured by Dow Corning TorayCo., Ltd.) were pulverized and dispersed for 2 hours by means of a paintshaker. Thereby, a slurry of titanium oxide treated with 2% of acryldendrimer was obtained. In addition, as Comparative Example 2, the sametype of untreated titanium oxide as described above was surface-treatedwith 2% of methylhydrogenpolysiloxane, and a slurry of titanium oxidehaving the same composition as described above using the aforementionedsurface-treated powders was prepared.

The rheology measurement of each of the aforementioned slurries oftitanium oxide was carried out using the following device under thefollowing conditions. The results are shown in FIG. 1.

Measurement device: AR1000-N cone-plate type viscometer manufactured byTA InstrumentsMeasurement conditions: 40 mm 1° geometry made of steel, shearingrate=0.01 to 1,000 s⁻¹ at 25° C.

As shown in FIG. 1, it can be seen that when the surface-treatmentagents according to Synthesis Examples 3 and 6 are used, the viscosityof the slurry is reduced and a slurry with superior feeling on touch canbe provided, as compared with the case of using the surface-treatmentagent of Comparative Synthesis Example 1, or as compared with the caseof using the surface-treatment agent of Comparative Synthesis Example 2,even if the same dispersion conditions are used.

Evaluation 3

The treatment efficiency, was evaluated using the aforementioned treatedpowders according to Examples 1 and 7. The treated titanium oxideaccording to each of Examples 1 and 7 was stirred and washed with anexcess amount of toluene for one hour. Subsequently, the mixture wassubjected to centrifugal separation, and the supernatant toluene andunreacted powder-treatment were extracted. The aforementioned operationwas repeated three times, and toluene was removed by drying.Subsequently, the contact angle of water with the treated powder wasmeasured. The results are shown in Table 2.

TABLE 2 Contact angle of Contact angle of water before washing waterafter washing Sample with toluene with toluene Example 1 151 degrees 151degrees (containing an alkoxysilyl group) Example 7 142 degrees 110degrees (containing no alkoxysilyl group)

From the aforementioned experiments, it can be seen that containing analkoxysilyl group in a powder-treatment agent is effective in order toextend the duration of water repellency.

Hereinafter, composition examples and preparation examples of cosmeticof the present invention are described in detail.

Composition Example 1

Oil-in-water cosmetic (Components) (parts(s))  (1) Stearic acid 2.5  (2)Glyceryl stearate 1.9  (3) Cetostearyl alcohol 0.4  (4) Behenyl alcohol0.1  (5) Liquid paraffin 9.9  (6) Propylene glycol 9  (7) Xanthan gum0.5  (8) Cellulose gum 0.5  (9) Hectorite 0.5 (10) Triethanolamine 1.2(11) Methylparaben 0.1 (12) Purified water 63.3 (13) Titanium oxidetreated with 8.6 Synthesis Example 1 (14) Yellow iron oxide treated with1 Synthesis Example 1 (15) Red iron oxide treated with 0.3 SynthesisExample 1 (16) Black iron oxide treated with 0.2 Synthesis Example 1

Preparation Method

-   1. Components 1 to 5 are heated and dissolved.-   2. Components 13 to 16 are added to the oil phase obtained in step 1    and are uniformly dispersed by means of a homomixer.-   3. Components 6 to 12 are uniformly heated and mixed.-   4. The aqueous phase obtained in step 3 is added to the oil phase    obtained in step 2, and the mixture is stirred and emulsified by    means of a homomixer.

Composition Example 2

Powder foundation (Components) (part(s))  (1) Talc treated with 32Synthesis Example 6  (2) Mica 27  (3) Zinc oxide treated with analkylsilane 2  (4) Titanium oxide treated with a silicone 10  (5) Yellowiron oxide treated with a silicone 2.5  (6) Red iron oxide treated witha silicone 1  (7) Black iron oxide treated with a silicone 0.3  (8)Barium sulfate 5  (9) Polymethylmethacrylate 1 (10)Dimethicone/vinyldimethicone 1 crosspolymer/silica (Note 1) (11)Cyclopentasiloxane, dimethicone 8 crosspolymer (Note 2) (12) Ethylhexylmethoxycinnamate 1 (13) Squalane 2.5 (14) Phenylmethylsilicone 2 (15)Diisostearyl malate 3 (16) Polyether-modified silicone (Note 3) 1.5 (17)Paraben 0.2 (Note 1) DC9701 manufactured by Dow Corning Toray Co., Ltd.(Note 2) DC9045 manufactured by Dow Corning Corporation (Note 3) SS-2910manufactured by Dow Corning Toray Co., Ltd.

Preparation Method

-   1. Components 10 to 17 aree mixed and dissolved.-   2. Components 1 to 9 are mixed.-   3. The mixture obtained in step 2 is added to the mixture obtained    in step 1, and the mixture is stirred and kneaded, and then    pulverized.-   4. The pulverized product obtained in step 3 is press-molded in a    metal mold, and thereby, a solid powder foundation is obtained.

Composition Example 3

Liquid foundation (Components) (part(s)) Phase A  (1) Dextrin palmitate2.1  (2) Glyceryl tricaprylate, glyceryl caprate 5  (3) PEG/PPG-18/18dimethicone (Note 1) 10  (4) PEG-12 dimethicone (Note 2) 1.9 Phase B (5) Cyclopentasiloxane 8  (6) Dimethicone (2 cs) 5  (7)Phenyltrimethicone 5  (8) Tristrimethylsiloxysilane 2  (9) Iron oxidetreated with 3.5 Synthesis Example 2 (2% treated) (10) Mica treated with3.5 Synthesis Example 2 (2% treated) (11) Cyclopentasiloxane/(acrylates/3 polytrimethylsiloxymethacrylate copolymer) (Note 3) (12)Cyclopentasiloxane, 2 Dimethicone crosspolymer (Note 4) Phase C (13)Purified water 48 (14) Sodium chloride 1 (Note 1) DC5225C manufacturedby Dow Corning Corporation (Note 2) DC193C manufactured by Dow CorningCorporation (Note 3) FA4001CM Silicone Acrylate manufactured by DowCorning Toray Co., Ltd. (Note 4) DC9040 manufactured by Dow CorningCorporation

Preparation Method

-   1. Components 1 to 4 are mixed at 80 to 90° C. to completely    dissolve the mixture, followed by cooling to 50° C.-   2. Components 5 to 12 are mixed.-   3. Phase A obtained in step 1 and Phase B obtained in step 2 are    mixed.-   4. Components 13 and 14 are added to the mixture obtained in step 3    over 30 seconds, and the mixture is stirred.-   5. After the addition, the mixture is stirred for 3 minutes, for 3    minutes and for 4, minutes.

Composition Example 4

Sunscreen (W/O) double-layer of shaking type (Components) (part(s))  (1)Octyl methoxycinnamate 8  (2) Hexyl diethylaminohydroxybenzoylbenzoate 2 (3) Slurry prepared in Synthesis Example 2 1  (4) Slurry of zinc oxidetreated with 32 Synthesis Example 6  (5) Cyclopentasiloxane 20.2  (6)Cyclopentasiloxane, 3 dimethicone crosspolymer (Note 1)  (7)Trimethylsiloxysilicic acid (Note 2) 3.3  (8) Preservatives 0.9  (9)Ethanol 5 (10) 1,3-butylene glycol 3 (11) Water 21.6 (Note 1) DC9045manufactured by Dow Corning Corporation (Note 2) BY11-018 manufacturedby Dow Corning Toray Co., Ltd.

Preparation Method

-   1. Components 1 to 9 are mixed.-   2. Components 10 and 11 are mixed.-   3. The mixture obtained in step 2 is added to the mixture obtained    in step 1 to emulsify them.

Composition Example 5

Sunscreen (W/O) cream (Components) (part(s)) Phase A  (1) Octylmethoxycinnamate 6.0  (2) Hexyl diethylaminohydroxybenzoylbenzoate 1.5 (3) Cyclopentasiloxane 5  (4) Cyclopentasiloxane/(acrylates/ 3polytrimethylsiloxymethacrylate copolymer) (Note 1)  (5) Dimethicone (6cs) 1  (6) Trioctanoin 1  (7) Cyclopentasiloxane, 3 dimethiconecrosspolymer (Note 2)  (8) Polysilicone 13 (Note 3) 2  (9) Zinc oxide,cyclopentasiloxane 10 (slurry concentration = 50%) (10) Slurry oftitanium oxide 2 produced in Example 2 Phase B (11) Sodium chloride 1(12) Panthenol 0.5 (13) Purified water 61.95 (14) Glycerol 2 (15)Preservatives 0.05 (Note 1) FA4001CM Silicone Acrylate manufactured byDow Corning Toray Co., Ltd. (Note 2) DC9040 manufactured by Dow CorningCorporation (Note 3) FZ-2233 manufactured by Dow Corning Toray Co., Ltd.

Preparation Method

-   1. Components 1 to 10 are stirred by means of a disper.-   2. Components 11 to 15 are mixed.-   3. The mixture obtained in step 2 is added to the mixture obtained    in step 1, and the mixture is emulsified.

Composition Example 6

Lipstick (Components) (part(s))  (1) Ceresin wax 10  (2) Paraffin wax 8 (3) Candelilla wax 2  (4) Squalane 21.8  (5) Liquid lanolin 10  (6)Isodecyl isononanoate 13  (7) Isodecyl neopentanoate 12  (8) Glyceryltri(caprylate/caprate) 5  (9) Polyether-modified silicone (Note 1) 9(10) Titanium oxide treated with 2 Synthesis Example 8 (5%) (11) Red No.201 treated with 2 Synthesis Example 8 (2%) (12) Red No. 202 treatedwith 1 Synthesis Example 8 (2%) (13) Aluminum lake 3 (14) Antioxidant0.1 (15) Perfume 0.1 (Note 1) SH3775M manufactured by Dow Corning TorayCo., Ltd.

Preparation Method

All components are heated and mixed, and then poured into a mold.Subsequently, the mixture is cooled.

Composition Example 7

Liquid foundation (O/W) (Components) (part(s)) Phase A  (1) Stearic acid3  (2) Glyceryl stearate/PEG-100 stearyl 2  (3) Cetyl octanoate 3  (4)Squalane 3.4  (5) Dimethicone (6 cs) 2.3  (6) Trimethylsiloxysilicicacid (Note 1) 6.7 Phase B  (7) 1,3-butylene glycol 8  (8) Titanium oxidetreated with 9.5 Synthesis Example 1  (9) Red iron oxide treated with0.35 Synthesis Example 1 (10) Black iron oxide treated with 0.1Synthesis Example 1 (11) Yellow iron oxide treated with 1.5 SynthesisExample 1 (12) Talc 1 (13) Preservatives 0.3 Phase C (14) Purified water57.95 Phase D (15) Triethanolamine 0.9 (Note 1) BY11-018 manufactured byDow Corning Toray Co., Ltd.

Preparation Method

-   1. Components 7 to 13 are mixed.-   2. Components 1 to 6 are mixed at 80 to 90° C. to completely    dissolve the mixture, followed by cooling to 50° C.-   3. Component 14 is heated to 85° C.-   4. Phase B obtained in step 1 is added to Phase A obtained in step 2    over 30 seconds, and the mixture is stirred at 3,000 rpm.-   5. The revolutions per minute are decreased to 1,000 rpm, and Phase    C obtained in step 3 is added thereto.-   6. The mixture is stirred for 5 minutes.-   7. Component 15 is added to adjust to a pH of 6 to 6.5.

Composition Example 8

Powder foundation (Components) (part(s))  (1)Dimethicone/vinyldimethicone 1 crosspolymer/lauroyl lysine (Note 1)  (2)Titanium oxide treated with an alkylsilane 9  (3) Zinc oxide fineparticles treated with 5 an alkylsilane  (4) Titanium oxide fineparticles treated with 5 an alkylsilane  (5) Red iron oxide 0.2  (6)Yellow iron oxide 1.4  (7) Black iron oxide 0.3  (8) Platy bariumsulfate 7.5 (average particle size = 30 μm)  (9) Paraben 0.2 (10) Talcremainder (11) Sericite treated with Synthesis Example 2 3 (12) Nylonpowder 7.5 (13) Phenylmethylsilicone 5 (14) C₃₀₋₄₅ alkyldimethylsilyl 2Polypropylsilsesquioxane (Note 2) (15) Ethylhexyl methoxycinnamate 1(16) Diisostearyl malate 3 (17) Dimethylpolysiloxane (350 cSt) 2 (18)Glycerol 0.2 (19) Perfume q.s. (Note 1) EP-9289LL manufactured by DowCorning Toray Co., Ltd. (Note 2) SW-8005 C30 Resin Wax manufactured byDow Corning Corporation

Preparation Method

-   1. Components 11 to 19 are mixed and dissolved.-   2. Components 1 to 10 are mixed.-   3. The mixture obtained in step 2 is added to the mixture obtained    in step 1, and the mixture is mixed and kneaded, followed by    pulverizing.-   4. The mixture obtained in step 3 is press-molded in a metal mold,    and thereby, a solid powder foundation is obtained.

Composition Example 9

Lipstick (Components) (part(s)) Phase A  (1) Alkyl-modified silicone(Note 1) 2  (2) Microcrystalline wax 1  (3) Red iron oxide 1 (69% in DC5562 Carbinol Fluid)  (4) Red No. 7 (42% in DC 5562 Carbinol Fluid) 10 (5) Yellow iron oxide 1 (55% in DC 5562 Carbinol Fluid)  (6) Malic aciddiester 1  (7) Lauryl PEG/PPG-18/18 dimethicone (Note 2) 4.2 Phase B (8) Organic bentonite (Benton 38) 2 Phase C  (9) Dimethicone (2 cs)18.5 (10) Cyclopentasiloxane/(acrylates/ 20polytrimethylsiloxymethacrylate copolymer) (Note 3) (11)Trimethylsiloxysilicic acid (Note 4) 3 (12) Dimethicone with high degree2 of polymerization (Note 5) (13) Silylated silica 1 (14) Mica treatedwith Synthesis Example 3 9 Phase D (15) Carbomer (2% aqueous solution)20 (16) Preservatives q.s. (17) Purified water 4.8 Phase G (18) Perfumeq.s. (Note 1) AMS-C30 COSMETIC WAX manufactured by Dow CorningCorporation (Note 2) DC5200 Formulation Aid manufactured by Dow CorningCorporation (Note 3) FA4001CM Silicone Acrylate manufactured by DowCorning Toray Co., Ltd. (Note 4) BY11-018 manufactured by Dow CorningToray Co., Ltd. (Note 5) BY11-040 manufactured by Dow Corning Toray Co.,Ltd.

Preparation Method

-   1. Components 1 to 7 are mixed at 80° C.-   2. Component 8 is added to the mixture obtained in step 1, and then    mixed.-   3. Components 9 to 14 are mixed at 70° C.-   4. The mixture obtained in step 2 and the mixture obtained in step 3    are mixed.-   5. Components 15 to 17 are mixed and then added to the mixture    obtained in step 4 to emulsify them.-   6. Component 18 is added thereto.

Composition Example 10

Transparent lip gloss (Components) (part(s)) (1) Polyamide-modifiedsilicone (2-8178) 16.5 (2) Decamethylpentacyclosiloxane 33 (3)Isododecane/(acrylates/ 3 polytrimethylsiloxymethacrylate copolymer) (4)Isopropyl myristate 20 (5) Glyceryl tricaprylate/glyceryl tricaprate21.8 (6) Trimethylpentaphenyltrisiloxane 5.5 (7) Titanium oxide treatedwith 0.2 Synthesis Example 4

Preparation Method

-   1. All components are mixed at 100° C.-   2. The mixture is poured into a metal mold.-   3. The mixture in the mold is allowed to stand for 1 hour.

Composition Example 11

Mascara (Components) (part(s)) Phase A  (1) Candelilla wax 10  (2)Microcrystalline wax 7  (3) Carnauba wax 3  (4) Stearic acid 5  (5)Glyceryl stearate 5 Phase B  (6) Water 35.5  (7) Polypropylene glycol 5 (8) Triethanolamine 1.5 Phase C  (9) Black iron oxide treated with 10Synthesis Example 5 (10) Polypropylsilsesquioxane (Note 1) 10 (11)Isododecane 8 (Note 1) DC670 Fluid manufactured by Dow CorningCorporation

Preparation Method

-   1. Components 1 to 5 are heated to 85° C. and mixed.-   2. Components 9 to 11 are heated and mixed.-   3. The mixture obtained in step 1 and the mixture obtained in step 2    are mixed.-   4. Components 6 to 8 are mixed and heated to 80° C.-   5. While the mixture obtained in step 3 is stirred at 1,000 rpm, the    mixture obtained in step 1 is added thereto over 30 seconds.-   6. Component 9 is added to the mixture obtained in step 3, stirred    for 2 minutes and cooled.

Composition Example 12

Eye shadow (Components) (part(s)) Phase A  (1) Talc 39.4  (2) Zincstearate 5  (3) Mica treated with Synthesis Example 6 10  (4) Iron oxide30  (5) Black iron oxide 0.5  (6) Red iron oxide 1  (7) Yellow ironoxide 2  (8) Dimethicone/vinyldimethicone crosspolymer 3  (9)Polyamide-modified silicone (Note 1) 1 Phase B (10) Glyceryltricaprylate/glyceryl tricaprate 4 (11)Bishydroxyethoxypropyldimethicone (Note 2) 4 (12) Preservatives q.s.(Note 1) DC2-8178 manufactured by Dow Corning Corporation (Note 2)DC-5562 manufactured by Dow Corning Corporation

Preparation Method

-   1. Components 1 to 9 are mixed until a uniform color is obtained.-   2. Components 10 to 12 are mixed.-   3. Phase B obtained in step 2 is added to Phase A obtained in step 1    while stirring.

1. A surface-treatment agent for powders for use in cosmetics, saidsurface-treatment agent comprising a polymer having a carbosiloxanedendrimer structure presented by the following formula (1):

wherein Z is a divalent organic group; p is 0 or 1; each of R¹ and R²independently represents an alkyl group, an aryl group or an aralkylgroup, having 1 to 10 carbon atoms; and L¹ is a silylalkyl group, in thecase of i=1, represented by the following formula (2):

wherein Z and p are the same as defined above; R¹ and R² are the same asdefined above; i is an integer ranging from 1 to 10, which specifies thetotal number of generations of the silylalkyl group; L^(i+1) is a groupselected from the group consisting of a hydrogen atom, alkyl, aryl andaralkyl groups, having 1 to 10 carbon atoms and the silylalkyl group,with the proviso that in the case of i=c, in which c is an integerranging from 1 to 10 and specifies generation of the silylalkyl group,L^(i+1) is a hydrogen atom, or an alkyl, aryl or aralkyl group, having 1to 10 carbon atoms; and in the case of i<c, L^(i+1) is the silylalkylgroup; and a^(i) is an integer ranging from 0 to
 3. 2. Thesurface-treatment agent for powders for use in cosmetics according toclaim 1, wherein said polymer is a copolymer of, at least, (A) anunsaturated monomer having a carbosiloxane dendrimer structure presentedby the following formula (1):

wherein Z is a divalent organic group; p is 0 or 1; each of R¹ and R²independently represents an alkyl group, an aryl group or an aralkylgroup, having 1 to 10 carbon atoms; and L¹ is a silylalkyl group, in thecase of i=1, represented by the following formula (2):

wherein Z and p are the same as defined above; R¹ and R² are the same asdefined above; i is an integer ranging from 1 to 10, which specifies thetotal number of generations of the silylalkyl group; L^(i+1) is a groupselected from the group consisting of a hydrogen atom, alkyl, aryl andaralkyl groups, having 1 to 10 carbon atoms and the silylalkyl group,with the proviso that in the case of i=c, in which c is an integerranging from 1 to 10 and specifies generation of the silylalkyl group,L^(i+1) s a hydrogen atom, or an alkyl, aryl or aralkyl group, having 1to 10 carbon atoms; and in the case of i<c, L^(i+1) is the silylalkylgroup; and a^(i) is an integer ranging from 0 to 3, and (B) anunsaturated monomer having at least one silicon-bonding alkoxy group. 3.The surface-treatment agent for powders for use in cosmetics accordingto claim 2, wherein said unsaturated monomer having the carbosiloxanedendrimer structure (A) has a group selected from the group consistingof an acryl or methacryl group-containing organic group represented bythe following general formula:

wherein R⁴ is a hydrogen atom or a methyl group; and R⁵ is an alkylenegroup having 1 to 10 carbon atoms, or

wherein R⁴ and R⁵ are the same as defined above, an alkenylarylgroup-containing organic group represented by the following generalformula:

wherein R⁶ is a hydrogen atom or a methyl group; R⁷ is an alkyl grouphaving 1 to 10 carbon atoms; R⁸ is an alkylene group having 1 to 10carbon atoms; b is an integer ranging from 0 to 4; and c is 0 or 1, andan alkenyl group having 2 to 10 carbon atoms.
 4. The surface-treatmentagent for powder for use in a cosmetic according to claim 2, whereinsaid polymer is obtained by further copolymerizing (C) at least oneunsaturated monomer having no silicon-bonding alkoxy group.
 5. Thesurface-treatment agent for powder for use in a cosmetic according toclaim 4, wherein said at least one unsaturated monomer having nosilicon-bonding alkoxy group (C) has a C₁₋₆ lower alkyl group.
 6. Thesurface-treatment agent for powder for use in a cosmetic according toclaim 4, wherein said copolymer is obtained by copolymerizing saidunsaturated monomer having a carbosiloxane dendrimer structure (A), saidunsaturated monomer having at least one silicon-bonding alkoxy group(B), and said at least one unsaturated monomer having no silicon-bondingalkoxy group (C), in a weight ratio satisfying conditions of {(weight ofcomponent (A))/(weight of all the monomers)}:{(weight of component(B))/(weight of all the monomers)}: {(weight of component (C))/(weightof all the monomers)} in the range of (0.02 to 0.7):(0.05 to 0.45):(0.01to 0.75).
 7. The surface-treatment agent for powder for use in acosmetic according to claim 4, wherein said copolymer is obtained bycopolymerizing said unsaturated monomer having a carbosiloxane dendrimerstructure (A), said unsaturated monomer having at least onesilicon-bonding alkoxy group (B), and said at least one unsaturatedmonomer having no silicon-bonding alkoxy group (C), in a weight ratiosatisfying conditions of {(weight of component (A))/(weight of all themonomers)}:{(weight of component (B))/(weight of all themonomers)}:{(weight of component (C))/(weight of all the monomers)} inthe range of (0.02 to 0.7):(0.05 to 0.45):(0.01 to 0.75), and {(weightof component (A))/(weight of all the monomers)}≧{(weight of component(B))/(weight of all the monomers)}.
 8. A powder for use in a cosmetic,surface-treated with the surface-treatment agent for powder as recitedin claim
 1. 9. A cosmetic comprising the powder as recited in claim 8.10. The cosmetic according to claim 9, further comprising at least oneoil agent.
 11. The cosmetic according to claim 10, wherein said oilagent is a silicone oil.
 12. The cosmetic according to claim 11, whereinsaid silicone oil is a hydrophobic silicone oil having a viscosity at25° C. ranging from 0.65 to 100,000 mm²/s.
 13. The cosmetic according toclaim 11, wherein said silicone oil is an organopolysiloxane representedby the following general formula (3), (4) or (5):

wherein R⁹ is a hydrogen atom, a hydroxyl group or a group selected frommonovalent non-substituted or fluorine- or amino-substituted C₁₋₃₀ alkylgroups, aryl groups, alkoxy groups and groups represented by(CH₃)₃SiO{(CH₃)₂SiO}_(i)Si(CH₃)₂CH₂CH₂—, wherein 1 is an integer rangingfrom 0 to 1,000; a′ is an integer ranging from 0 to 3; b′ is an integerranging from 0 to 1,000; and c′ is an integer ranging from 0 to 1,000,with the proviso that 1≦b′+c′≦2,000,

wherein R⁹ is the same as defined above; d is an integer ranging from 0to 8; and e is an integer ranging from 0 to 8, with the proviso that3≦d+e≦8,R⁹ _((4-f))Si(OSiCH₃)_(g)  (5) wherein R⁹ is the same as defined above;f is an integer ranging from 1 to 4; and g is an integer ranging from 0to
 500. 14. The cosmetic according to claim 9, further comprising atleast one surfactant selected from the group consisting of anionicsurfactants, cationic surfactants, nonionic surfactants, amphotericsurfactants and semi-polar surfactants.
 15. The cosmetic according toclaim 9, further comprising at least one powder and/or at least onecoloring agent.
 16. The cosmetic according to claim 15, wherein saidpowder is selected from the group consisting of inorganic pigmentpowders, organic pigment powders and resin powders, having an averageparticle size ranging from 1 nm to 20 μm.
 17. The cosmetic according toclaim 1, further comprising at least one powder and/or at least onecoloring agent, wherein at least one part of said powder and/or coloringagent is subjected to a water repellent treatment by means of asurface-treatment agent other than the surface-treatment agent forpowder for use in a cosmetic.
 18. The cosmetic according to claim 9,further comprising at least one selected from the group consisting ofwater-soluble polymers, oil-soluble gelling agents and organo-modifiedclay minerals.
 19. The cosmetic according to claim 9, further comprisingat least one selected from the group consisting of silicone resins,silicone elastomers and organo-modified silicones.
 20. The cosmeticaccording to claim 9, further comprising at least one UV-ray protectivecomponent.
 21. A skin care product, a hair product, an antiperspirantproduct, a deodorant product, a makeup product or a UV-ray protectiveproduct comprising the cosmetic as recited in claim 9.